The Sierra Pelona, also known as the Sierra Pelona Ridge
[ or the Sierra Pelona Mountains, is a ]mountain ridge
A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
in the Transverse Ranges
The Transverse Ranges are a group of mountain ranges of southern California, in the Pacific Coast Ranges physiographic region in North America. The Transverse Ranges begin at the southern end of the California Coast Ranges and lie within Santa ...
in Southern California
Southern California (commonly shortened to SoCal) is a geographic and 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 populous urban ...
. Located in northwest Los Angeles County
Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the List of the most populous counties in the United States, most populous county in the United States and in the U.S. state of California, ...
, the ridge is bordered on the north by the San Andreas fault
The San Andreas Fault is a continental transform fault that extends roughly through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal) ...
and lies within and is surrounded by the Angeles National Forest
The Angeles National Forest (ANF) of the U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County in southern California. The ANF manages a majority of the San Gabriel Mountai ...
.
Geography
The Sierra Pelona Mountains lie northwest of the San Gabriel Mountains
The San Gabriel Mountains ( es, Sierra de San Gabriel) are a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies betw ...
, which are divided by the wide Soledad Canyon
Soledad Canyon is a long narrow canyon/valley located in Los Angeles County, California between the cities of Palmdale and Santa Clarita. It is a part of the Santa Clara River Valley, and extends from the top of Soledad Pass to the open plain of ...
formation. The mountains are flanked to the south by the Santa Clarita Valley
The Santa Clarita Valley (SCV) is part of the upper watershed of the Santa Clara River in Southern California. The valley was part of the Rancho San Francisco Mexican land grant. Located in Los Angeles County, its main population center is th ...
and separated from the Antelope Valley
The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and ...
and the Mojave Desert
The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...
to the north by the San Andreas Fault
The San Andreas Fault is a continental transform fault that extends roughly through California. It forms the tectonic boundary between the Pacific Plate and the North American Plate, and its motion is right-lateral strike-slip (horizontal) ...
. Toward the southeast lie Vasquez Rocks, thrust up by the fault. The Tejon Pass
The Tejon Pass , previously known as ''Portezuelo de Cortes'', ''Portezuela de Castac'', and Fort Tejon Pass is a mountain pass between the southwest end of the Tehachapi Mountains and northeastern San Emigdio Mountains, linking Southern Calif ...
separates the Sierra Pelonas, the San Emigdios and the Tehachapis near Gorman and Lebec.
Within the Sierra Pelonas lie the rural areas of Neenach, Three Points, Lake Hughes
Lake Hughes is an unincorporated community in northern Los Angeles County, California. It is in the Sierra Pelona Mountains, northwest of Palmdale and north of the Santa Clarita Valley, in the Angeles National Forest. It is on the sag pond wate ...
, Elizabeth Lake, Acton, Agua Dulce and Green Valley. The cities of Santa Clarita
Santa Clarita (; Spanish for "Little St. Clare") is a city in northwestern Los Angeles County in the U.S. state of California. With a 2020 census population of 228,673, it is the third-largest city by population in Los Angeles County, the 17t ...
, Palmdale
Palmdale is a city in northern Los Angeles County in the U.S. state of California. The city lies in the Antelope Valley region of Southern California. The San Gabriel Mountains separate Palmdale from the Los Angeles Basin to the south.
On Aug ...
, and Lancaster are located at the base of the mountains.
Climate
The climate of the mountains is a Mediterranean climate
A Mediterranean climate (also called a dry summer temperate climate ''Cs'') is a temperate climate sub-type, generally characterized by warm, dry summers and mild, fairly wet winters; these weather conditions are typically experienced in the ...
. Summers are mostly dry except for occasional thunderstorms, and winters comparatively cold and wet. Snowfall is infrequent due to the relatively low elevations of mountains within this ridge, with only the few tallest peaks regularly receiving snowfall during the winter.
Ecology
Mainly the ridge falls under 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, excepting the northeastern flank's gradual slope into the Antelope Valley
The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and ...
near Palmdale
Palmdale is a city in northern Los Angeles County in the U.S. state of California. The city lies in the Antelope Valley region of Southern California. The San Gabriel Mountains separate Palmdale from the Los Angeles Basin to the south.
On Aug ...
where the ecology transitions to that of the Mojave Desert
The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...
. The mountains are primarily covered in short grasses, scrub oak Scrub oak is a common name for several species of small, shrubby oaks. It may refer to:
*the Chaparral plant community in California, or to one of the following species.
In California
*California scrub oak (''Quercus berberidifolia''), a widespr ...
trees, yucca
''Yucca'' is a genus of perennial shrubs and trees in the family Asparagaceae, subfamily Agavoideae. Its 40–50 species are notable for their rosettes of evergreen, tough, sword-shaped leaves and large terminal panicles of white or whitis ...
, and other chaparral
Chaparral ( ) is a shrubland plant community and geographical feature found primarily in the U.S. state of California, in southern Oregon, and in the northern portion of the Baja California Peninsula in Mexico. It is shaped by a Mediterranea ...
shrubs. The ridge is prone to wildfires in the summer and fall, especially when the Santa Ana winds
The Santa Ana winds (sometimes devil winds) "Scholars who have looked into the name's origins generally agree that it derives from Santa Ana Canyon, the portal where the Santa Ana River -- as well as a congested Riverside (CA-91) Freeway -- leav ...
blow in from the Antelope Valley.
Hydrology
Three major tributaries of the Santa Clara River and numerous minor watercourses and washes drain the ridge: Castaic Creek
Castaic Creek (Chumash: ''Kaštiq'') is a , accessed March 16, 2011 stream in the Sierra Pelona Mountains, in northeastern Los Angeles County, California. It is a tributary of the Santa Clara River.
Castaic Lake
Castaic Dam on the creek form ...
, San Francisquito Creek
San Francisquito Creek (Spanish for "Little San Francisco" - the "little" referring to size of the settlement compared to Mission San Francisco de Asís) is a creek that flows into southwest San Francisco Bay in California, United States. Histo ...
, and Bouquet Creek.
Three sag pond
A sag pond is a body of fresh water collected in the lowest parts of a depression formed between two sides of an active strike-slip, transtensional or normal fault zone.
Formation
A sag pond is formed along a strike-slip fault, which may creat ...
s nestle within the narrow valley that divides the mountains from the Antelope Valley: Hughes Lake, Munz Lakes
Munz Lakes is a small lake located directly on the San Andreas Fault in the northern Sierra Pelona Mountains, within Los Angeles County, California.
Geography
The lake is one of a series of sag ponds created by active tectonic plate movement of ...
, and Elizabeth Lake.
Human history
Native American habitation
The Native population of California in the Sierra Pelona and Santa Susana Mountains
The Santa Susana Mountains are a transverse range of mountains in Southern California, north of the city of Los Angeles, in the United States. The range runs east-west, separating the San Fernando and Simi valleys on its south from the Santa C ...
included the Tataviam and Serrano people. They traded with the Tongva
The Tongva ( ) are an Indigenous people of California from the Los Angeles Basin and the Southern Channel Islands, an area covering approximately . Some descendants of the people prefer Kizh as an endonym that, they argue, is more historically ...
and Chumash Chumash may refer to:
*Chumash (Judaism), a Hebrew word for the Pentateuch, used in Judaism
*Chumash people, a Native American people of southern California
*Chumashan languages, indigenous languages of California
See also
*Chumash traditional n ...
to the south and west, until the Spanish colonization of the Americas
Spain began colonizing the Americas under the Crown of Castile and was spearheaded by the Spanish . The Americas were invaded and incorporated into the Spanish Empire, with the exception of Brazil, British America, and some small regions ...
relocated them from their homelands.
18th and 19th centuries
The San Francisquito Canyon
San Francisquito Canyon is a canyon created through erosion of the Sierra Pelona Mountains by the San Francisquito Creek, in Los Angeles County, Southern California.
Geography
The canyon cuts through the Sierra Pelona Mountains, which are centr ...
, which runs north-south through the mountains, served as a major wagon route between the Antelope and San Fernando Valleys. This corridor summited at San Francisquito Pass and was part of the El Camino Viejo
El Camino Viejo a Los Ángeles ( en, the Old Road to Los Angeles), also known as El Camino Viejo and the Old Los Angeles Trail, was the oldest north-south trail in the interior of Spanish colonial Las Californias (1769–1822) and Mexican Alta Cal ...
- an alternate land route to the El Camino Real for reaching northern Spanish and Mexican colonial Alta California - as well as the Butterfield Overland Mail
Butterfield Overland Mail (officially the Overland Mail Company)Waterman L. Ormsby, edited by Lyle H. Wright and Josephine M. Bynum, "The Butterfield Overland Mail", The Huntington Library, San Marino, California, 1991. was a stagecoach service i ...
route.
20th century
The Ridge Route
The Ridge Route, officially the Castaic–Tejon Route, was a two-lane highway between Los Angeles County and Kern County, California. Opened in 1915 and paved with concrete between 1917 and 1921, the road was the first paved highway directly ...
, a landmark two-lane highway that connected Los Angeles
Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world' ...
to the rest of California, was built along the western flank of the ridge and was completed in 1915. It was later bypassed by the Ridge Route Alternate (US 99
U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the US–Mexico border to Blaine, Washington, on the U.S.-Canada borde ...
) in 1930, itself superseded by Interstate 5
Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Califor ...
completed in 1971.
The rapid development of Southern California
Southern California (commonly shortened to SoCal) is a geographic and 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 populous urban ...
throughout the 20th century saw construction of the Los Angeles Aqueduct
The Los Angeles Aqueduct system, comprising the Los Angeles Aqueduct (Owens Valley aqueduct) and the Second Los Angeles Aqueduct, is a water conveyance system, built and operated by the Los Angeles Department of Water and Power. The Owens Valley ...
and five separate reservoirs to supply water to the region: Castaic Lake
Castaic Lake (Chumash: ''Kaštiq'') is a reservoir formed by Castaic Dam on Castaic Creek, in the Sierra Pelona Mountains of northwestern Los Angeles County, California, United States, near the town of Castaic.
The California Office of Enviro ...
, Bouquet Reservoir
Bouquet Reservoir is an artificial lake in the Angeles National Forest of Los Angeles County, California about west from Palmdale.
At elevation of in the Sierra Pelona Mountains, the reservoir capacity is and is formed by Bouquet Canyon Dam ...
, Drinkwater Reservoir, and Dry Canyon Reservoir and the St. Francis Reservoir, both now drained and destroyed.
Highest peaks
* Burnt Peak: 5,788 ft (1,764 m)
* Liebre Mountain: 5,760+ ft (1,756+ m)
* Sawmill Mountain: 5,514 ft (1,681 m)
* Mount McDill: 5,177 ft (1,578 m)
* Jupiter Mountain: 4,498 ft (1,371 m)
* Redrock Mountain (benchmark): 3,991 ft (1,216 m)
Adjacent landforms
* Tehachapi Mountains
The Tehachapi Mountains (; Kawaiisu: ''Tihachipia'', meaning "hard climb") are a mountain range in the Transverse Ranges system of California in the Western United States. The range extends for approximately in southern Kern County and northwest ...
- on the north
* San Emigdio Mountains
The San Emigdio Mountains are a part of the Transverse Ranges in Southern California, extending from Interstate 5 at Lebec and Gorman on the east to Highway 33–166 on the west. They link the Tehachapis and Temblor Range and form the southern ...
- on the northwest
* Topatopa Mountains
The Topatopa Mountains are a mountain range in Ventura County, California, north of Ojai, Santa Paula, and Fillmore. They are part of the Transverse Ranges of Southern California.
Etymology
A name for the mountains was first inscribed within the ...
- on the west
* Santa Susana Mountains
The Santa Susana Mountains are a transverse range of mountains in Southern California, north of the city of Los Angeles, in the United States. The range runs east-west, separating the San Fernando and Simi valleys on its south from the Santa C ...
- to the southwest
* San Gabriel Mountains
The San Gabriel Mountains ( es, Sierra de San Gabriel) are a mountain range located in northern Los Angeles County and western San Bernardino County, California, United States. The mountain range is part of the Transverse Ranges and lies betw ...
- to the east
* Santa Clarita Valley
The Santa Clarita Valley (SCV) is part of the upper watershed of the Santa Clara River in Southern California. The valley was part of the Rancho San Francisco Mexican land grant. Located in Los Angeles County, its main population center is th ...
- to the south
* Soledad Canyon
Soledad Canyon is a long narrow canyon/valley located in Los Angeles County, California between the cities of Palmdale and Santa Clarita. It is a part of the Santa Clara River Valley, and extends from the top of Soledad Pass to the open plain of ...
- to the southeast
* Antelope Valley
The Antelope Valley is located in northern Los Angeles County, California, and the southeast portion of Kern County, California, and constitutes the western tip of the Mojave Desert. It is situated between the Tehachapi, Sierra Pelona, and ...
(part of the Mojave Desert
The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...
) - on the east-northeast
References
See also
* Centennial, California, a proposed master-planned community in the area
{{Santa Clara River
Transverse Ranges
Mountains of the Mojave Desert
Mountains of Los Angeles County, California
Angeles National Forest