O'Neill Regional Park is a major regional park and greenway in eastern Orange County,

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

, located along Trabuco Creek and Live Oak Canyon. The park encompasses of canyon and

riparian zone A riparian zone or riparian area is the interface between land and a river or stream. In some regions, the terms riparian woodland, riparian forest, riparian buffer zone, riparian corridor, and riparian strip are used to characterize a ripari ...

habitat, and includes campgrounds and trails for hiking, biking and horseback riding. The park was first established in 1948 when the owners of the O'Neill Ranch donated of land for recreation purposes. Numerous land acquisitions between 1948 and 1982 brought the park to its present size. Many

flora Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. The corresponding term for animals is ''fauna'', and for f ...

and

fauna Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and '' funga'', respectively. Flora, fauna, funga and other forms of life are collectively ...

can be sighted, such as poison oak,

bobcats The bobcat (''Lynx rufus''), also known as the wildcat, bay lynx, or red lynx, is one of the four extant species within the medium-sized wild cat genus ''Lynx''. Native to North America, it ranges from southern Canada through most of the con ...

and

mountain lions The cougar (''Puma concolor'') (, '' KOO-gər''), also called puma, mountain lion, catamount and panther is a large small cat native to the Americas. It inhabits North, Central and South America, making it the most widely distributed wild ...

, which are very rare. The

Acjachemen The Acjachemen () are an Indigenous people of California. Published maps often identify their ancestral lands as extending from the beach to the mountains, south from what is now known as Aliso Creek (Orange County), Aliso Creek in Orange County, ...

village site of

Alume Alume ( ''Acjachemen'': "raising the head in looking upward") was a large Acjachemen village located at the foot of Santiago Peak, upstream from the village of Putiidhem, within what is now O'Neill Regional Park near the Trabuco Adobe, which wa ...

is located within the park's area.

Geography

The long, narrow park is located in the foothills of the

Santa Ana Mountains The Santa Ana Mountains are a short peninsular mountain range along the coast of Southern California in the United States. They extend for approximately southeast of the Los Angeles Basin largely along the border between Orange and Riversid ...

and includes about of Trabuco Creek (Arroyo Trabuco), a major seasonal stream and tributary of

San Juan Creek San Juan Creek, also called the San Juan River, is a stream in Orange County, California, Orange and Riverside County, California, Riverside Counties, draining a watershed of .7.5 Minute Quadrangle Map, U.S. Geological Survey, San Juan Capistr ...

. The park also includes the western half of Live Oak Canyon, which is drained by Hickey Creek. The creeks usually contain water in winter and early spring. The valley areas contain native

coast live oak ''Quercus agrifolia'', the California live oak, or coast live oak, is an evergreen live oak native to the California Floristic Province. Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and sheddi ...

and

sycamore Sycamore is a name which has been applied to several types of trees, but with somewhat similar leaf forms. The name derives from the Ancient Greek () meaning . Species of otherwise unrelated trees known as sycamore: * ''Acer pseudoplatanus'', a ...

forests as well as meadows. The hillsides are covered in cactus, wild buckwheat,

sagebrush Sagebrush is the common name of several woody and herbaceous species of plants in the genus ''Artemisia (plant), Artemisia''. The best-known sagebrush is the shrub ''Artemisia tridentata''. Sagebrush is native to the western half of North Amer ...

chaparral Chaparral ( ) is a shrubland plant plant community, community found primarily in California, southern Oregon, and northern Baja California. It is shaped by a Mediterranean climate (mild wet winters and hot dry summers) and infrequent, high-intens ...

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 widesp ...

buckthorn ''Rhamnus'' is a genus of about 140 accepted species of shrubs or small trees, commonly known as buckthorns, in the family Rhamnaceae. Its species range from tall (rarely to ) and are native mainly in east Asia and North America, but found thr ...

and

mountain mahogany ''Cercocarpus'', commonly known as mountain mahogany, is a small genus of at least nine species of nitrogen-fixing flowering plants in the rose family, Rosaceae. They are native to the western United States and northern Mexico, where they grow i ...

. The area experiences a

Mediterranean climate A Mediterranean climate ( ), also called a dry summer climate, described by Köppen and Trewartha as ''Cs'', is a temperate climate type that occurs in the lower mid-latitudes (normally 30 to 44 north and south latitude). Such climates typic ...

with cool, wet winters and hot, dry summers. Caution is advised as the park is home to mountain lions and rattlesnakes.

Facilities

The park includes about of trails, which are used by hikers, mountain bikers and equestrians. There are day-use picnic and barbecue areas throughout the park. The Arroyo Campground is located off Live Oak Canyon Road and includes 79 campsites, including eight large group campsites and five horse camping sites. A school can be found near the campsites, where children actually attend every day. The school has a room full of taxidermies of the local fauna, a farm, and an entrance to O’Neill.

References

{{coord, 33, 39, 06, N, 117, 36, 01, W, display=title Regional parks in California Parks in Orange County, California

Geography

Facilities

See also

References