Anza-Borrego Desert State Park
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Anza-Borrego Desert State Park (, '' AN-zə bə-RAY-goh'') is a
California State Park The California Department of Parks and Recreation, more commonly known as California State Parks, manages the California state parks system. The system administers 279 separate park units on 1.4 million acres (570,000 hectares), with over 280 ...
located within the
Colorado Desert California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna. Geography and geology The Colorado De ...
of
southern California Southern California (commonly shortened to SoCal) is a geographic and Cultural area, cultural region that generally comprises the southern portion of the U.S. state of California. It includes the Los Angeles metropolitan area, the second most po ...
, United States. The park takes its name from 18th century Spanish explorer
Juan Bautista de Anza Juan Bautista de Anza Bezerra Nieto (July 6 or 7, 1736 – December 19, 1788) was an expeditionary leader, military officer, and politician primarily in California and New Mexico under the Spanish Empire. He is credited as one of the founding fa ...
and ''borrego'', a Spanish word for sheep. With that includes one-fifth of
San Diego County San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fi ...
, it is the largest state park in California. The park occupies eastern San Diego County and reaches into
Imperial Imperial is that which relates to an empire, emperor, or imperialism. Imperial or The Imperial may also refer to: Places United States * Imperial, California * Imperial, Missouri * Imperial, Nebraska * Imperial, Pennsylvania * Imperial, Texa ...
and
Riverside Riverside may refer to: Places Australia * Riverside, Tasmania, a suburb of Launceston, Tasmania Canada * Riverside (electoral district), in the Yukon * Riverside, Calgary, a neighbourhood in Alberta * Riverside, Manitoba, a former rural m ...
counties, enveloping two communities:
Borrego Springs Borrego Springs (''Borrego'', Spanish for "Sheep") is a census-designated place (CDP) in San Diego County, California. The population was 3,429 at the 2010 census, up from 2,535 at the 2000 census, made up of both seasonal and year-round resid ...
, which is home to the park's headquarters, and Shelter Valley.


Geography

The park is an anchor in the
Mojave and Colorado Deserts Biosphere Reserve The Mojave and Colorado Deserts Biosphere Reserve is a biosphere reserve designated by UNESCO in 1984 to promote the ecological conservation of a cluster of areas in the Mojave and Colorado deserts of California. A principal feature is Death Valle ...
, and adjacent to the
Santa Rosa and San Jacinto Mountains National Monument The Santa Rosa and San Jacinto Mountains National Monument is a National Monument in southern California. It includes portions of the Santa Rosa and San Jacinto mountain ranges, the northernmost ones of the Peninsular Ranges system. The nationa ...
. The great bowl of the surrounding desert is surrounded by mountains, with the
Vallecito Mountains The Vallecito Mountains are located in the Colorado Desert, in eastern San Diego County, Southern California. They are about north of the U.S. border with Mexico. Geography The mountains lie in Anza-Borrego Desert State Park, in an east–west ...
to the south and the highest Santa Rosa Mountains to the north which are in the wilderness area, without paved roads and with the only year-round creeks. Blair Valley is a valley in the State Park. It consists of the main Blair Valley and Little Blair Valley separated by a small mountain range over which ''Foot and Walker Pass'' leads. To the west of the valley lies Granite Mountain, to the east the range of
Vallecito Mountains The Vallecito Mountains are located in the Colorado Desert, in eastern San Diego County, Southern California. They are about north of the U.S. border with Mexico. Geography The mountains lie in Anza-Borrego Desert State Park, in an east–west ...
. The valley can be crossed by dirt roads, e.g., to reach a look-out point over ''Smuggler Canyon'' or sites of Indian pre-Hispanic art. Borrego Palm Canyon is the site of park headquarters and has “the most famous view point in the park, overlooking barren, spectacularly eroded Borrego Badlands.” Tamarisk Grove hosts a campground and is close to
Yaqui Well The Yaqui, Hiaki, or Yoeme, are a Native American people of the southwest, who speak a Uto-Aztecan language. Their homelands include the Río Yaqui valley in Sonora, Mexico, and the area below the Gila River in Arizona, Southwestern United Stat ...
, a “historic watering spot…with magnificent
desert ironwood ''Olneya tesota'' is a perennial flowering tree of the family Fabaceae, legumes (peas, beans, etc.), which is commonly known as ironwood, desert ironwood, or palo fierro in Spanish. It is the only species in the monotypic genus ''Olneya''. This ...
trees and a busy wildlife population.”


Visiting

The park has of dirt roads, 12 designated
wilderness area Wilderness or wildlands (usually in the plural), are natural environments on Earth that have not been significantly modified by human activity or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally re ...
s, and of
hiking trails A trail, also known as a path or track, is an unpaved lane or small road usually passing through a natural area. In the United Kingdom and the Republic of Ireland, a path or footpath is the preferred term for a pedestrian or hiking trail. The ...
. Park information and maps are available in the visitor center. The park has
Wi-Fi Wi-Fi () is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio wave ...
access. The park is approximately a two-hour drive northeast from
San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the List of United States cities by population, eigh ...
, southeast from
Riverside Riverside may refer to: Places Australia * Riverside, Tasmania, a suburb of Launceston, Tasmania Canada * Riverside (electoral district), in the Yukon * Riverside, Calgary, a neighbourhood in Alberta * Riverside, Manitoba, a former rural m ...
or Irvine, and south from
Palm Springs Palm Springs (Cahuilla: ''Séc-he'') is a desert resort city in Riverside County, California, United States, within the Colorado Desert's Coachella Valley. The city covers approximately , making it the largest city in Riverside County by land ...
. Access on the east-
Coachella Valley , map_image = Wpdms shdrlfi020l coachella valley.jpg , map_caption = Coachella Valley , location = California, United States , coordinates = , width = , boundaries = Salton Sea (southeast), Santa Rosa Mountains (southwest), San Jacint ...
side is via County Route S22 and State Route 78. Access on the west-
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...
side is via California County Routes S79. S67 provides access through the high and forested
Laguna Mountains The Laguna Mountains are a mountain range of the Peninsular Ranges System in eastern San Diego County, southern California. The mountains run in a northwest/southeast alignment for approximately . The mountains have long been inhabited by the i ...
, such as in
Cuyamaca Rancho State Park Cuyamaca Rancho State Park is a state park in Southern California, United States, located east of San Diego in the Cuyamaca and Laguna Mountains of the Peninsular Ranges. The park's feature pine, fir, and oak forests, with meadows and streams ...
. These highways climb from the coast to above sea level, then descend down into the
Borrego Valley Borrego Valley Groundwater Basin, located in the very southern region of California, is one of the driest basins in the state. With climate change predicted to have strong effects into foreseeable future, the region is viewed with a skepticism in ...
in the center of the park. A popular site to hike to near the visitor center is Hellhole Palms, a grove of California fan palms in Hellhole Canyon near Maidenhair Falls. The park also provides access points to the
Pacific Crest Trail The Pacific Crest Trail (PCT), officially designated as the Pacific Crest National Scenic Trail, is a long-distance hiking and equestrian trail closely aligned with the highest portion of the Cascade and Sierra Nevada mountain ranges, which lie ...
. Stargazing is another activity at Anza-Borrego. The park was designated a
Dark Sky Park A dark-sky preserve (DSP) is an area, usually surrounding a park or observatory, that restricts artificial light pollution. The purpose of the dark-sky movement is generally to promote astronomy. However, astronomy is certainly not the only obje ...
by the
International Dark-Sky Association The International Dark-Sky Association (IDA) is a United States-based non-profit organization incorporated in 1988 by founders David Crawford, a professional astronomer, and Tim Hunter, a physician/amateur astronomer. The mission of the IDA is " ...
in 2018.


Flora and fauna

The
habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
s are primarily within the
Colorado Desert California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna. Geography and geology The Colorado De ...
ecosystem An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the syste ...
of the
Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Arizona ...
ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of l ...
. The higher extreme northern and eastern sections in the
Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...
are in the
California montane chaparral and woodlands The California montane chaparral and woodlands is an ecoregion defined by the World Wildlife Fund, spanning of mountains in the Transverse Ranges, Peninsular Ranges, and Coast Ranges of southern and central California. The ecoregion is part of ...
ecoregion. The park has about 600 species of native plants. The park contains ''bajadas'' and desert washes; rock formations and colorful
badlands Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded."Badlands" in ''Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 47. They are characterized by steep slopes, m ...
, large arid landscapes, and mountains. The bajadas are predominantly creosote bush-bur sage with creosote bush (''
Larrea tridentata ''Larrea tridentata'', called creosote bush and greasewood as a plant, chaparral as a medicinal herb, and ''gobernadora'' (Spanish language, Spanish for "governess") in Mexico, due to its ability to secure more water by inhibiting the growth of n ...
'') and the palo verde-cactus shrub ecosystems with the palo verde tree (''
Parkinsonia microphylla ''Parkinsonia microphylla'', the yellow paloverde, foothill paloverde or little-leaved palo verde; syn. ''Cercidium microphyllum''), is a species of palo verde. It is native to the Southwestern United States in southeastern California and so ...
''),
cacti A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek ...
, and
ocotillo ''Fouquieria splendens'' (commonly known as ocotillo (), but also referred to as buggywhip, coachwhip, candlewood, slimwood, desert coral, Jacob's staff, Jacob cactus, and vine cactus) is a plant indigenous to the Sonoran Desert and Chihuahuan ...
. In the washes, Colorado/Sonoran microphylla woodlands can be found. These woodlands include such plants as smoke tree (''
Psorothamnus spinosus ''Psorothamnus spinosus'', or ''Delea spinosa'', is a perennial legume tree of the deserts in North America. Common names include smokethorn, smoketree, smoke tree, smokethorn dalea, and corona de Cristo. Distribution ''P. Spinosus'' is nati ...
''), velvet mesquite (''
Prosopis velutina ''Prosopis velutina'', commonly known as velvet mesquite, is a small to medium-sized tree. It is a legume adapted to a dry, desert climate. Though considered to be a noxious weed in states outside its natural range, it plays a vital role in the ...
''), and catclaw (''
Acacia greggii ''Senegalia greggii'', formerly known as ''Acacia greggii'', is a species of tree in the genus ''Senegalia'' native to the southwestern United States and northern Mexico, from the extreme south of Utah south through southern Nevada, southeast Ca ...
''). The park is home to elephant trees (''
Bursera microphylla ''Bursera microphylla'', known by the common name elephant tree in English or 'torote' in Spanish, is a tree in genus ''Bursera''. It grows into a distinctive sculptural form, with a thickened, water-storing or caudiciform trunk. It is found in ...
''), which are “fairly common in parts of Baja California but north of the border practically confined to the Anza-Borrego region.” The park has natural springs and oases, with the state's only native palm, the
California fan palm ''Washingtonia filifera'', the desert fan palm, California fan palm, or California palm,Flora of North America Association. ''Flora of North America: North of Mexico Volume 22: Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in Part), and Zi ...
. Seasonal wildflower displays can be seen in many plant community association throughout the park. The high-country to the north and east has closed-cone pine forests,
manzanita Manzanita is a common name for many species of the genus ''Arctostaphylos''. They are evergreen shrubs or small trees present in the chaparral biome of western North America, where they occur from Southern British Columbia and Washington to Or ...
s and oak woodlands. The oases are prolific with many types of fauna, especially for bird-watching. Throughout the park, visitors may see
bighorn sheep The bighorn sheep (''Ovis canadensis'') is a species of sheep native to North America. It is named for its large horns. A pair of horns might weigh up to ; the sheep typically weigh up to . Recent genetic testing indicates three distinct subspec ...
, mountain lions,
kit fox The kit fox (''Vulpes macrotis'') is a fox species that inhabits arid and semi-arid regions of the southwestern United States and northern and central Mexico. These foxes are the smallest of the four species of ''Vulpes'' occurring in North Amer ...
es,
mule deer The mule deer (''Odocoileus hemionus'') is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer. Unlike the related whit ...
,
coyote The coyote (''Canis latrans'') is a species of canis, canine native to North America. It is smaller than its close relative, the wolf, and slightly smaller than the closely related eastern wolf and red wolf. It fills much of the same ecologica ...
s,
greater roadrunner The greater roadrunner (''Geococcyx californianus'') is a long-legged bird in the cuckoo family, Cuculidae, from the Aridoamerica region in the Southwestern United States and Mexico. The scientific name means "Californian earth-cuckoo". Along wit ...
s,
golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known bird of p ...
s,
black-tailed jackrabbit The black-tailed jackrabbit (''Lepus californicus''), also known as the American desert hare, is a common hare of the western United States and Mexico, where it is found at elevations from sea level up to . Reaching a length around , and a ...
s, ground squirrels, kangaroo rats,
quail Quail is a collective name for several genera of mid-sized birds generally placed in the order Galliformes. The collective noun for a group of quail is a flock, covey, or bevy. Old World quail are placed in the family Phasianidae, and New Wor ...
, and
prairie falcon The prairie falcon (''Falco mexicanus'') is a medium-large sized falcon of western North America. It is about the size of a peregrine falcon or a crow, with an average length of 40 cm (16 in), wingspan of approximately 1 meter (40&nb ...
s. In the reptile class,
desert iguana The desert iguana (''Dipsosaurus dorsalis'') is an iguana species found in the Sonoran and Mojave Deserts of the Southwestern United States and northwestern Mexico, as well as on several Gulf of California islands. Taxonomy The species was ...
s,
chuckwalla Chuckwallas are lizards found primarily in arid regions of the southwestern United States and northern Mexico. Some are found on coastal islands. The six species of chuckwallas are all placed within the genus ''Sauromalus''; they are part of th ...
s, and the red diamond rattlesnakes can be seen.


Desert bighorn sheep

Some areas are habitats for the
desert bighorn sheep The desert bighorn sheep (''Ovis canadensis nelsoni'') is a subspecies of bighorn sheep (''Ovis canadensis'') that is native to the deserts of the United States' intermountain west and southwestern regions, as well as northwestern Mexico. The Bu ...
. Observers count this
endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...
to study the population, and monitor its current decline from human encroachment.


Climate

Anza-Borrego State Park has a
hot desert climate The desert climate or arid climate (in the Köppen climate classification ''BWh'' and ''BWk''), is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert ...
(
BWh Bust/waist/hip measurements (informally called 'body measurements' or ′vital statistics′) are a common method of specifying clothing sizes. They match the three inflection points of the female body shape. In human body measurement, these t ...
) with very hot, dry summers and short, cool winters.


Geology and paleontology

The expanses of Anza-Borrego Desert State Park's eroded
badlands Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded."Badlands" in ''Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 47. They are characterized by steep slopes, m ...
also provide a different view into the region's long-vanished tropical past. The inland of southeastern California was not always a
desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...
.
Paleontology Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...
, the study of the
fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
ized remains of ancient life, is the key to understanding this prehistoric world. The park has an exceptional fossil record which includes preserved plants, a variety of
invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...
shells, animal tracks, and an array of bones and teeth. Most fossils found in the park date from six million to under a half million years in age (the
Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
epochs), or about 60 million years after the last
dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is t ...
age ended.


Geology

Anza-Borrego Desert State Park lies in a unique geologic setting along the western margin of the Salton Trough. This major topographic depression with the
Salton Sink The Salton Sink is the low point of an endorheic basin, a closed drainage system with no outflows to other bodies of water, in the Colorado Desert sub-region of the Sonoran Desert. The sink falls within the larger Salton Trough and separates the ...
having elevations of below sea level, forms the northernmost end of an active
rift valley A rift valley is a linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift. Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear dep ...
and a geological
continental plate Continental may refer to: Places * Continent, the major landmasses of Earth * Continental, Arizona, a small community in Pima County, Arizona, US * Continental, Ohio, a small town in Putnam County, US Arts and entertainment * ''Continental'' (a ...
boundary. The trough extends north from the Gulf of California to
San Gorgonio Pass The San Gorgonio Pass, or Banning Pass, is a elevation gap on the rim of the Great Basin between the San Bernardino Mountains to the north and the San Jacinto Mountains to the south. The pass was formed by the San Andreas Fault, a major trans ...
, and from the eastern rim of the
Peninsular Ranges The Peninsular Ranges (also called the Lower California province) are a group of mountain ranges that stretch from Southern California to the southern tip of the Baja California peninsula; they are part of the North American Coast Ranges, which ...
eastward to the
San Andreas Fault The San Andreas Fault is a continental transform fault that extends roughly through California. It forms the tectonics, tectonic boundary between the Pacific Plate and the North American Plate, and its motion is Fault (geology)#Strike-slip fau ...
zone along the far side of the
Coachella Valley , map_image = Wpdms shdrlfi020l coachella valley.jpg , map_caption = Coachella Valley , location = California, United States , coordinates = , width = , boundaries = Salton Sea (southeast), Santa Rosa Mountains (southwest), San Jacint ...
. Over the past seven million years, a relatively complete geologic record of over of fossil-bearing sediment has been deposited within the park along the rift valley's western margin. Paleontological remains are widespread and diverse, and are found scattered over hundreds of square miles of eroded badlands terrain extending south from the Santa Rosa Mountains into northern
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
in Mexico. Both marine and terrestrial environments are represented by this long and rich fossil record. Six million years ago, the ancestral
Gulf of California The Gulf of California ( es, Golfo de California), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Bermejo''), is a marginal sea of the Pacific Ocean that separates the Baja Ca ...
filled the Salton Trough, extending northward past what would become the city of Palm Springs. These tropical waters supported a profusion of both large and small marine organisms. Through time, the sea gave way as an immense volume of sediment eroded during the formation of the
Grand Canyon The Grand Canyon (, yuf-x-yav, Wi:kaʼi:la, , Southern Paiute language: Paxa’uipi, ) is a steep-sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is long, up to wide and attains a depth of over a m ...
spilled into the Salton Trough. Little by little, the ancestral
Colorado River The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid drainage basin, watershed that encompasses parts of ...
built a massive
river delta A river delta is a landform shaped like a triangle, created by deposition (geology), deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, res ...
across the seaway. Fossil hardwoods from the deltaic sands and associated coastal plain deposits suggest the region received three times as much rainfall as now. The Anza-Borrego region gradually changed from a predominantly marine environment into a system of interrelated terrestrial habitats. North of the
Colorado River Delta The Colorado River Delta is the region where the Colorado River flows into the Gulf of California (also known as the Sea of Cortez) in eastern Mexicali Municipality in the north of the state of Baja California in northwesternmost Mexico. The d ...
and intermittently fed by the river, a sequence of lakes and
dry lake A dry lake bed, also known as a playa, is a basin or depression that formerly contained a standing surface water body, which disappears when evaporation processes exceeds recharge. If the floor of a dry lake is covered by deposits of alkaline c ...
s has persisted for over three million years. At the same time, sediments eroded from the growing Santa Rosa Mountains and the other Peninsular Ranges to spread east into the trough. These sediments provide an almost unbroken terrestrial fossil record, ending only a half million years ago. Here, the deposits of ancient streams and rivers trapped the remains of wildlife that inhabited a vast brushland
savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...
h laced with
riparian A riparian zone or riparian area is the interface between land and a river or stream. Riparian is also the proper nomenclature for one of the terrestrial biomes of the Earth. Plant habitats and communities along the river margins and banks ar ...
woodland A woodland () is, in the broad sense, land covered with trees, or in a narrow sense, synonymous with wood (or in the U.S., the ''plurale tantum'' woods), a low-density forest forming open habitats with plenty of sunlight and limited shade (see ...
s.


Fossils

This record of changing environments and habitats includes over 550 types of fossil plants and animals, ranging from the preserved microscopic plant
pollen Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophyt ...
and
algal Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular mic ...
spore In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, f ...
s to
baleen whale Baleen whales (systematic name Mysticeti), also known as whalebone whales, are a parvorder of carnivorous marine mammals of the infraorder Cetacea (whales, dolphins and porpoises) which use keratinaceous baleen plates (or "whalebone") in their ...
bones and mammoth skeletons. Many of the species are extinct and some are known only from fossil remains recovered from this park. Combined with a long and complete sedimentary depositional sequence, these diverse fossil assemblages are an unparalleled paleontologic resource of international importance. Both the
Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
epoch boundary and the
Blancan The Blancan North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 4,750,000 to 1,806,000 years Before Present, BP, a period of .
-
Irvingtonian The Irvingtonian North American Land Mammal Age on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), spanning from 1.9 million – 250,000 years BP. ...
North American land mammal age The North American land mammal ages (NALMA) establishes a geologic timescale for North American fauna beginning during the Late Cretaceous and continuing through to the present. These periods are referred to as ages or intervals (or stages when ref ...
s boundary fall within the long geological record from the Anza-Borrego region. Environmental changes associated with these geological time divisions are probably better tracked by fossils from the Anza-Borrego region than in any other
North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
n continental platform stratum. These changes herald the beginning of the
Ice Ages An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gree ...
, and the strata contain fossil clues to the origin and development of modern southwestern desert landscapes. The first fossils, marine shells from the ancient Gulf of California and freshwater shells from a prehistoric era
Lake Cahuilla Lake Cahuilla ( ; also known as Lake LeConte and Blake Sea) was a prehistoric lake in California and northern Mexico. Located in the Coachella and Imperial valleys, it covered surface areas of to a height of above sea level during the Holocen ...
, the precursor of present-day
Salton Sea The Salton Sea is a shallow, landlocked, highly saline body of water in Riverside and Imperial counties at the southern end of the U.S. state of California. It lies on the San Andreas Fault within the Salton Trough that stretches to the Gulf o ...
, were collected and described by William Blake in 1853. Blake was the
geologist A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, althou ...
and
mineralogist Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the proce ...
for the
Pacific Railroad Surveys The Pacific Railroad Surveys (1853–1855) were of a series of explorations of the American West designed to find and document possible routes for a transcontinental railroad across North America. The expeditions included surveyors, scientists, and ...
commissioned by Congress and President
Franklin Pierce Franklin Pierce (November 23, 1804October 8, 1869) was the 14th president of the United States, serving from 1853 to 1857. He was a northern Democrat who believed that the abolitionist movement was a fundamental threat to the nation's unity ...
to find a railway route to the Pacific. Blake first named this region the Colorado Desert.


Marine period

Since the late 19th century, numerous scientific studies and published papers have centered on the marine organisms that inhabited the ancient Gulf of California. Fossil assemblages from the classic
Imperial Formation The Imperial Formation is the name of two distinct and unrelated geologic formations in North America, of different geologic Eras. Separate formations Canadian Paleozoic Era formation The older Imperial Formation occurs in the Northwest Territori ...
include
calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adje ...
nanoplankton Plankton are the diverse collection of organisms found in water (or air) that are unable to propel themselves against a current (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a cruc ...
and
dinoflagellate The dinoflagellates (Greek δῖνος ''dinos'' "whirling" and Latin ''flagellum'' "whip, scourge") are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata and are usually considered algae. Dinoflagellates are ...
s,
foraminifera Foraminifera (; Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of amoeboid protists characterized by streaming granular Ectoplasm (cell biology), ectoplasm for catching food and ot ...
,
coral Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and sec ...
s,
polychaete Polychaeta () is a paraphyletic class (biology), class of generally marine invertebrate, marine annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that ...
s,
clam Clam is a common name for several kinds of bivalve molluscs. The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway buried in the sand of the seafloor or riverbeds. Clams have two she ...
s,
gastropods The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. Ther ...
,
sea urchin Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...
s,
sand dollar Sand dollars (also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa) are species of flat, burrowing sea urchins belonging to the order Clypeasteroida. Some species within the order, not quite as flat, are k ...
s, and crabs and shrimp. The deposits also yield the remains of marine vertebrates, such as
shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimo ...
s and
rays Ray may refer to: Fish * Ray (fish), any cartilaginous fish of the superorder Batoidea * Ray (fish fin anatomy), a bony or horny spine on a fin Science and mathematics * Ray (geometry), half of a line proceeding from an initial point * Ray (gra ...
,
bony fish Osteichthyes (), popularly referred to as the bony fish, is a diverse superclass of fish that have skeletons primarily composed of bone tissue. They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilag ...
,
baleen whale Baleen whales (systematic name Mysticeti), also known as whalebone whales, are a parvorder of carnivorous marine mammals of the infraorder Cetacea (whales, dolphins and porpoises) which use keratinaceous baleen plates (or "whalebone") in their ...
s,
walrus The walrus (''Odobenus rosmarus'') is a large pinniped, flippered marine mammal with a discontinuous distribution about the North Pole in the Arctic Ocean and subarctic seas of the Northern Hemisphere. The walrus is the only living species in ...
es and
dugong The dugong (; ''Dugong dugon'') is a marine mammal. It is one of four living species of the order Sirenia, which also includes three species of manatees. It is the only living representative of the once-diverse family Dugongidae; its closest m ...
s. Marine environments such as an outer and inner shelf, platform reef, nearshore beach, and
lagoon A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') a ...
, are all represented within the Imperial Formation. As the sea became more shallow,
estuarine An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...
and
brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
marine conditions prevailed, typified by thick channel deposits of oyster and pecten shell
coquina Coquina () is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of the shells of mollusks, trilobites, brachiopods, or other invertebrates. The term ''coquina'' ...
that now form the "Elephant Knees" along Fish Creek. Many of the marine fossils are closely related to forms from the
Caribbean Sea The Caribbean Sea ( es, Mar Caribe; french: Mer des Caraïbes; ht, Lanmè Karayib; jam, Kiaribiyan Sii; nl, Caraïbische Zee; pap, Laman Karibe) is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico ...
. They document a time before the
Isthmus of Panama The Isthmus of Panama ( es, Istmo de Panamá), also historically known as the Isthmus of Darien (), is the narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North and South America. It contains the country ...
formed when the warm
Gulf Stream The Gulf Stream, together with its northern extension the North Atlantic Current, North Atlantic Drift, is a warm and swift Atlantic Ocean, Atlantic ocean current that originates in the Gulf of Mexico and flows through the Straits of Florida a ...
of the western
Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...
invaded eastern
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...
waters.


Terrestrial period

As North and
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ...
connected about three million years ago, terrestrial faunal north-south migrations began on a continental scale called the
Great American Interchange The Great American Biotic Interchange (commonly abbreviated as GABI), also known as the Great American Interchange and the Great American Faunal Interchange, was an important late Cenozoic paleozoogeographic biotic interchange event in which lan ...
, and are present in Anza-Borrego's fossils. Animals such as giant
ground sloth Ground sloths are a diverse group of extinct sloths in the mammalian superorder Xenarthra. The term is used to refer to all extinct sloths because of the large size of the earliest forms discovered, compared to existing tree sloths. The Caribbe ...
s and
porcupine Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of family Hystricidae, and the New World porcupines of family, Erethizont ...
s made their first appearance in North America at this time. The oldest terrestrial vertebrate fossils from the
Colorado Desert California's Colorado Desert is a part of the larger Sonoran Desert. It encompasses approximately , including the heavily irrigated Coachella and Imperial valleys. It is home to many unique flora and fauna. Geography and geology The Colorado De ...
predate the late
Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...
invasion of the Gulf of California. These very rare fossils include a
gomphothere Gomphotheres are any members of the diverse, extinct taxonomic family Gomphotheriidae. Gomphotheres were elephant-like proboscideans, but do not belong to the family Elephantidae. They were widespread across Afro-Eurasia and North America during ...
(elephant-like mammal),
rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are na ...
,
felid Felidae () is the family of mammals in the order Carnivora colloquially referred to as cats, and constitutes a clade. A member of this family is also called a felid (). The term "cat" refers both to felids in general and specifically to the dom ...
and small
camelid Camelids are members of the biological family Camelidae, the only currently living family in the suborder Tylopoda. The seven extant members of this group are: dromedary camels, Bactrian camels, wild Bactrian camels, llamas, alpacas, vicuñas, ...
, and were collected from 10– to 12-million-year-old
river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...
ine and near-shore lake deposits. However, the most significant and abundant vertebrate fossils have been recovered from the latest
Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ...
through late-
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
riverine and flood plain deposits of the Palm Spring Formation in the Vallecito and Fish Creek Badlands and Ocotillo Conglomerate exposed in the Borrego Badlands. These fossil assemblages occur in a 3.5-million-year-long, uninterrupted stratigraphic sequence that has been dated using horizons of volcanic ash and
paleomagnetic Paleomagnetism (or palaeomagnetismsee ), is the study of magnetic fields recorded in rocks, sediment, or archeological materials. Geophysicists who specialize in paleomagnetism are called ''paleomagnetists.'' Certain magnetic minerals in rock ...
methods. The
bestiary A bestiary (from ''bestiarum vocabulum'') is a compendium of beasts. Originating in the ancient world, bestiaries were made popular in the Middle Ages in illustrated volumes that described various animals and even rocks. The natural history a ...
for this savannah landscape includes some of the most unusual creatures to inhabit North America – animals such as:
''
Geochelone ''Geochelone'' is a genus of tortoises. ''Geochelone'' tortoises, which are also known as typical tortoises or terrestrial turtles, can be found in southern Asia. They primarily eat plants. Species The genus consists of two extant species: A ...
'', a giant bathtub-sized tortoise; '' Aiolornis incredibilis'', the largest flying bird of the Northern Hemisphere, with 17-ft (5.2-m) wing span; ''
Paramylodon ''Paramylodon'' is an extinct genus of ground sloth of the family Mylodontidae endemic to North America during the Pliocene through Pleistocene epochs, living from around ~4.9 Mya–11,000 years ago. It is also known as Harlan's ground sloth. ...
'', ''
Megalonyx ''Megalonyx'' (Greek, "large claw") is an extinct genus of ground sloths of the family Megalonychidae, native to North America during the Pliocene and Pleistocene epochs. It became extinct during the Quaternary extinction event at the end of th ...
'' and ''
Nothrotheriops ''Nothrotheriops'' is a genus of Pleistocene ground sloth found in North America, from what is now central Mexico to the southern United States. This genus of bear-sized xenarthran was related to the much larger, and far more famous '' Megatheriu ...
'', giant ground sloths, some with bony armor within their skin; '' Pewelagus'', a very small rabbit; ''
Borophagus ''Borophagus'' ("gluttonous eater") is an extinct genus of the subfamily Borophaginae, a group of canids endemic to North America from the Middle Miocene epoch through the Early Pleistocene epoch 12—1.8 Mya. Evolution ''Borophagus'', like o ...
'', a
hyena Hyenas, or hyaenas (from Ancient Greek , ), are feliform carnivoran mammals of the family Hyaenidae . With only four extant species (each in its own genus), it is the fifth-smallest family in the Carnivora and one of the smallest in the clas ...
-like dog; ''
Arctodus ''Arctodus'' is an extinct genus of short-faced bear that inhabited North America during the Pleistocene (~2.5 Mya until 12,000 years ago). There are two recognized species: the lesser short-faced bear (''Arctodus pristinus'') and the giant short- ...
'', a giant
short-faced bear The Tremarctinae or short-faced bears is a subfamily of Ursidae that contains one living representative, the spectacled bear (''Tremarctos ornatus'') of South America, and several extinct species from four genera: the Florida spectacled bear ('' ...
; ''
Smilodon ''Smilodon'' is a genus of the extinct machairodont subfamily of the felids. It is one of the most famous prehistoric mammals and the best known saber-toothed cat. Although commonly known as the saber-toothed tiger, it was not closely related ...
'', a
saber-toothed cat Machairodontinae is an extinct subfamily of carnivoran mammals of the family Felidae (true cats). They were found in Asia, Africa, North America, South America, and Europe from the Miocene to the Pleistocene, living from about 16 million until ...
; ''
Miracinonyx The American cheetah is either of two feline species of the extinct genus ''Miracinonyx'', endemic to North America during the Pleistocene epoch (2.6 million to 12,000 years ago) and morphologically similar to the modern cheetah (''Acinonyx j ...
'', the North American cheetah; '' Mammuthus imperator'', the largest known
mammoth A mammoth is any species of the extinct elephantid genus ''Mammuthus'', one of the many genera that make up the order of trunked mammals called proboscideans. The various species of mammoth were commonly equipped with long, curved tusks and, ...
; ''Tapirus'', an extinct
tapir Tapirs ( ) are large, herbivorous mammals belonging to the family Tapiridae. They are similar in shape to a pig, with a short, prehensile nose trunk. Tapirs inhabit jungle and forest regions of South and Central America, with one species inhabit ...
; '' Equus enormis'' and ''
Equus scotti ''Equus scotti'' (translated from Latin as Scott's horse, (2003) ''Annotated Bibliography of Quaternary Vertebrates of Northern North America: With Radiocarbon Dates'', University of Toronto Press, 539 pages named after vertebrate paleontologis ...
'', two species of extinct Pleistocene horses; ''
Gigantocamelus ''Titanotylopus'' is an extinct genus of terrestrial herbivore in the family Camelidae, endemic to North America from the late Hemphillian stage of the Miocene through the Irvingtonian stage of the Pleistocene. It was one of the last survivi ...
'' a giant camel; and ''
Capromeryx minor ''Capromeryx'' (dwarf pronghorn) was a genus of dwarf pronghorns (Antilocapridae) that originated in North America during the Pliocene about 5 million years ago (the exact range of their presence on the landscape is still not known, but the most re ...
'', the dwarf
pronghorn The pronghorn (, ) (''Antilocapra americana'') is a species of artiodactyl (even-toed, hoofed) mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American a ...
.


Native Americans

The Native Americans of the surrounding mountains and deserts include the
Cahuilla The Cahuilla , also known as ʔívil̃uqaletem or Ivilyuqaletem, are a Native American people of the various tribes of the Cahuilla Nation, living in the inland areas of southern California.Cupeño The Cupeño (or Kuupangaxwichem) are a Native American tribe of Southern California. They traditionally lived about inland and north of the modern day Mexico–United States border in the Peninsular Range of Southern California. Today their ...
, and
Kumeyaay The Kumeyaay, also known as Tipai-Ipai or by their historical Spanish name Diegueño, is a tribe of Indigenous peoples of the Americas who live at the northern border of Baja California in Mexico and the southern border of California in the Unit ...
(Diegueño) Native American tribes. It was the homeland of these peoples for thousands of years, and their artists created
petroglyph A petroglyph is an image created by removing part of a rock surface by incising, picking, carving, or abrading, as a form of rock art. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions ...
and
pictogram A pictogram, also called a pictogramme, pictograph, or simply picto, and in computer usage an icon, is a graphic symbol that conveys its meaning through its pictorial resemblance to a physical object. Pictographs are often used in writing and ...
rock art In archaeology, rock art is human-made markings placed on natural surfaces, typically vertical stone surfaces. A high proportion of surviving historic and prehistoric rock art is found in caves or partly enclosed rock shelters; this type also ...
expressing their cultures.


Park interpretive associations

The Anza-Borrego Foundation, founded in 1967, is a non-profit educational organization and is the sole cooperating association of the park. It manages all sales at the State Park Visitor Center and State Park Store. The Anza-Borrego Institute, the education arm of the foundation, provides in-depth educational courses to more than 100,000 visitors each year. The institute offers in-depth field programs, a fifth-grade environmental camp, citizen science research, and Parks Online Resources for Teachers and Students. The foundation's mission is to protect and preserve the natural landscapes, wildlife habitat, and cultural heritage of the park for the benefit and enjoyment of present and future generations.


Gallery

Image:Bighorn_Sheep-Anza_Borrego.jpg, Peninsular bighorn sheep in Anza-Borrego Desert State Park Image:Desertflower.JPG, A desert marigold pushes its way through the dry, cracked, and sun-hardened desert after a rare and substantial rainfall Image:0703Chuckwalla.JPG, Common
chuckwalla Chuckwallas are lizards found primarily in arid regions of the southwestern United States and northern Mexico. Some are found on coastal islands. The six species of chuckwallas are all placed within the genus ''Sauromalus''; they are part of th ...
, ''Sauromalus ater'' in Palm Canyon, near Palm Springs Image:Ocotillo02262006.JPG, An
ocotillo ''Fouquieria splendens'' (commonly known as ocotillo (), but also referred to as buggywhip, coachwhip, candlewood, slimwood, desert coral, Jacob's staff, Jacob cactus, and vine cactus) is a plant indigenous to the Sonoran Desert and Chihuahuan ...
plant common in Anza-Borrego Desert State Park Image: Arecaceae - Washingtonia filifera - California Fan Palm.webm,
Washingtonia filifera ''Washingtonia filifera'', the desert fan palm, California fan palm, or California palm,Flora of North America Association. ''Flora of North America: North of Mexico Volume 22: Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in Part), and Zi ...
in Borrego Palm Canyon. Video clip Image: Cactaceae - Cylindropuntia bigelovii - Cholla Cactus.webm,
Cylindropuntia bigelovii ''Cylindropuntia bigelovii'', the teddy-bear cholla ''(choy-ya''), is a cholla cactus species native to Northwestern Mexico, and to the United States in California, Arizona, and Nevada. Description ''Cylindropuntia bigelovii'' has a soft appe ...
. Video clip Image: Cactareae - Ferocactus cylindraceus - Barrel Cactus.webm,
Ferocactus cylindraceus ''Ferocactus cylindraceus'' is a species of barrel cactus which is known by several common names, including California barrel cactus, Desert barrel cactus, and miner's compass. It was first described by George Engelmann in 1853. Distribution and ...
. Video clip


See also

* ''
Last Days in the Desert ''Last Days in the Desert'' is a 2015 American drama film directed and written by Rodrigo García. The film stars Ewan McGregor, Tye Sheridan, Ciarán Hinds and Ayelet Zurer. ''Last Days in the Desert'' premiered at the 2015 Sundance Film Festi ...
'', a 2015 movie filmed in the park *
Mojave and Colorado Deserts Biosphere Reserve The Mojave and Colorado Deserts Biosphere Reserve is a biosphere reserve designated by UNESCO in 1984 to promote the ecological conservation of a cluster of areas in the Mojave and Colorado deserts of California. A principal feature is Death Valle ...
**
Man and the Biosphere Programme Man and the Biosphere Programme (MAB) is an intergovernmental scientific program, launched in 1971 by UNESCO, that aims to establish a scientific basis for the improvement of relationships between people and their environments. MAB's work engag ...
** World Network of Biosphere Reserves in the United States *
Mud Caves The Mud Caves are a popular feature in Anza Borrego Desert State Park in San Diego County, California. The caves, located in the Carrizo Badlands, along the Arroyo Tapiado, were created by water flowing through a thick deposit of silt and are ...
*
Ocotillo Wells, California Ocotillo Wells is an unincorporated community in San Diego County, California, United States. It is west of the Imperial County line on California State Route 78 at an elevation of . The name became official in 1962 when it was adopted for ...
*
Shelter Valley, California Shelter Valley is a community in San Diego County in the U.S. state of California. The town is located along County Route S2, two miles (3.2 km) south of its intersection with State Route 78 (known as Scissors Crossing) and east of Jul ...


References

;Specific ; General * Hogan, C. Michael (2009)
''California Fan Palm: Washingtonia filifera'', GlobalTwitcher.com, ed. Nicklas Stromberg
* Jefferson, George T. and Lowell Lindsay (2006). ''Fossil Treasures of the Anza-Borrego Desert'' ( Sunbelt Publications, San Diego).


Further reading

* Halford, Robin (2005). ''Hiking in Anza-Borrego Desert: Over 100 Half-Day Hikes'' (Anza Borrego Desert Natural History Association, Borrego Springs). * * Lindsay, Diana (2001). ''Anza-Borrego A to Z: People, Places, and Things'' ( Sunbelt Publications, San Diego). * Lindsay, Lowell, and Diana (2006). ''The Anza-Borrego Desert Region: A Guide to the State Park and Adjacent Areas of the Western Colorado Desert. Fifth Edition'' (Wilderness Press, Berkeley). * ''
Serenity (film) Serenity may refer to: Arts, entertainment, and media * ''Serenity'' (2019 film), a thriller starring Matthew McConaughey, Anne Hathaway and Diane Lane * Sailor Moon (character), also known as Princess Serenity and Neo-Queen Serenity, in the ' ...
'' – location shooting in the park for the 2005 feature film shows the environs. * – Marshal South and his wife, Tanya, wrote a series of highly popular "Desert Refuge" articles (1940–1946) for the ''
Desert Magazine ''Desert Magazine'' was a monthly regional publication based in the Colorado Desert published between 1937 and 1985. A print version bearing the same name has been revived in the Coachella Valley town of Palm Desert near Palm Springs, California ...
'' about their primitive life in the desert. They lived in a home they called ''Yaquitepec'' on a mountaintop named Ghost Mountain near Blair Dry Lake


External links


official ''Anza-Borrego Desert State Park'' website

Anza-Borrego Foundation

Anza-Borrego Desert Natural History Association

Juan Bautista de Anza National Historic Trail

Anza Borrego Tribute

Anza Borrego Hiking

Fish Creek Wash & Carrizo Badlands

Borrego Springs Chamber & Visitors' Bureau
{{Authority control
Anza-Borrego Desert State Park Anza-Borrego Desert State Park (, '' AN-zə bə-RAY-goh'') is a California State Park located within the Colorado Desert of southern California, United States. The park takes its name from 18th century Spanish explorer Juan Bautista de Anza and ...
State parks of California Colorado Desert Nature centers in California Nature reserves in California Parks in Imperial County, California Parks in Riverside County, California Parks in San Diego County, California Protected areas of the Colorado Desert National Natural Landmarks in California Santa Rosa Mountains (California) Salton Trough 1933 establishments in California Protected areas established in 1933 Campgrounds in California Parks in Southern California