Anza-Borrego Desert State Park

Anza-Borrego Desert State Park
IUCN category III (natural monument or feature)
Desert view from Font's Point
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Location	San Diego, Imperial, and Riverside Counties, California, USA
Nearest city	Borrego Springs and Julian, California
Coordinates	33°15′33″N 116°23′57″W / 33.25917°N 116.39917°W / 33.25917; -116.39917Coordinates: 33°15′33″N 116°23′57″W / 33.25917°N 116.39917°W / 33.25917; -116.39917
Area	585,930 acres (237,120 ha)
Established	1933
Governing body	California Department of Parks and Recreation

U.S. National Natural Landmark
Designated	1974

Anza-Borrego Desert State Park (ABDSP) is a 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 borrego, the Spanish word for bighorn sheep.^[1] With 600,000 acres (240,000 ha) that includes one-fifth of San Diego County, ABDSP is the largest state park in California and, after New York's Adirondack Park, the second largest in the contiguous United States. The park occupies eastern San Diego County and reaches into Imperial and Riverside counties, enveloping two communities: Borrego Springs (home of the park headquarters) and Shelter Valley.

Geography

ABDSP is around a two-hour drive northeast from San Diego, southeast from Riverside or Irvine, and south from Palm Springs. The park is an anchor in the Mojave and Colorado Deserts Biosphere Reserve, and adjacent to the Santa Rosa and San Jacinto Mountains National Monument.

Visiting

Vista of the Anza Borrego desert landscape

ABDSP includes 500 mi (800 km) of dirt roads, 12 designated wilderness areas, and 110 mi (180 km) of hiking trails to provide visitors with many opportunities to experience the park's unique version of the Colorado Desert environs. Park information and maps, interpretive events and displays and listening devices for the hearing impaired are all available in the Visitor Center.^[2] ABDSP has Wi-Fi access to the Internet in various sections of the park, as do 55 other California state parks.

Many visitors approach ABDSP from the east-Coachella Valley side via California County Route S22 and S78. Visitors can also approach from the west-Pacific Ocean side via California County Routes S79 or S67 and add experiences of passing through the high and forested Laguna Mountains, such as in Cuyamaca Rancho State Park.^[3] These highways climb from the coast to 2,400 ft (730 m) above sea level, then descend 2,000 ft (610 m) down into the Borrego Valley in the center of the park. The great bowl of the surrounding desert is surrounded by mountains, with the Vallecito Mountains to the south and the highest Santa Rosa Mountains to the north. They are in the park's wilderness area, without paved roads and with the only year-round creeks in ABDSP.

Flora and fauna

Cactus in bloom

Desert bighorn sheep at Palm Canyon Oasis.

The habitats of ABDSP are primarily within the Colorado Desert ecosystem of the Sonoran Desert ecoregion. The higher extreme northern and eastern sections in the Peninsular Ranges are in the California montane chaparral and woodlands ecoregion.

The park features: bajadas and desert washes; rock formations and colorful badlands, vast arid landscapes, and dramatic mountains. The bajadas are predominantly creosote bush-bur sage with creosote bush (Larrea tridentata) and the palo verde-cactus shrub ecosystems with the palo verde tree (Parkinsonia microphylla), cacti, and ocotillo. In the washes, Colorado/Sonoran microphylla woodlands can be found. These woodlands include such plants as smoke tree (Psorothamnus spinosus), velvet mesquite (Prosopis velutina), and catclaw (Acacia greggii).^[4]

ABDSP has natural springs and oases, with the state's only native palm, the California fan palm (Washingtonia filifera). Seasonal wildflower displays can be stunning in any plant community association throughout the park. The high-country to the north and east has closed-cone pine forests, manzanitas and oak woodlands.

The oases are prolific with all types of fauna, especially for bird-watching. Throughout the park, visitors may see kit foxes, mule deer, coyotes, greater roadrunners, golden eagles, black-tailed jackrabbits, ground squirrels, kangaroo rats, quail, and prairie falcons. In the reptile class, desert iguanas, chuckwallas, and the red diamond rattlesnakes can be seen — with caution.

Desert bighorn sheep

Some areas of ABDSP are habitat for the Peninsular bighorn sheep, often called desert bighorn sheep. Few park visitors see them, and the sheep are justly wary. A patient few observers each year see and count this endangered species to study the population, and to monitor its current decline from human overpopulation encroachment.^[5]

Geology and paleontology

Panoramic view from Font's Point westward over Borrego Valley to the Laguna Mountains

The expanses of ABDSP's eroded badlands also provide a different view into the region's long-vanished tropical past. The inland of southeastern California was not always a desert. Paleontology, the study of the fossilized remains of ancient life, is the key to understanding this prehistoric world. ABDSP has an exceptional fossil record which includes preserved plants, a variety of invertebrate shells, animal tracks, and an array of bones and teeth. Most fossils found in ABDSP date from six million to under a half million years in age (the Pliocene and Pleistocene epochs), or about 60 million years after the last dinosaur age ended.^[6]

Geology

Anza-Borrego rock outcrop and flora

Agua Caliente Springs and valley towards south

ABDSP lies in a unique geologic setting along the western margin of the Salton Trough. This major topographic depression with the Salton Sink having elevations of 200 ft (61 m) below sea level, forms the northernmost end of an active rift valley and a geological continental plate boundary. The trough extends north from the Gulf of California to San Gorgonio Pass, and from the eastern rim of the Peninsular Ranges eastward to the San Andreas Fault zone along the far side of the Coachella Valley. Over the past 7 million years, a relatively complete geologic record of over 20,000 ft (6,100 m) 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 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 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 spilled into the Salton Trough. Little by little, the ancestral Colorado River built a massive river delta across the sea way. 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 predominately marine environment into a system of interrelated terrestrial habitats. North of the Colorado River Delta and intermittently fed by the river, a sequence of lakes and dry lakes has persisted for over three million years. At the same time, sediments eroded from the growing Santa Rosa Mountains and 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 savannah laced with riparian woodlands.

Fossils

This record of changing environments and habitats includes over 550 types of fossil plants and animals, ranging from preserved microscopic plant pollen and algal spores to baleen whale 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-Pleistocene epoch boundary and the Blancan-Irvingtonian North American land mammal ages 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 American continental platform stratum. These changes herald the beginning of the Ice Ages, 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, precursor of present-day Salton Sea, were collected and described by William Blake in 1853. Blake was the geologist and mineralogist for the Pacific Railroad Surveys commissioned by Congress and President Franklin Pierce to find a railway route to the Pacific. Blake first named this region the Colorado Desert.

Marine period

Pre-Columbian era rock art in the Indian Hill archeological area.

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' include calcareous nanoplankton and dinoflagellates, foraminifera, corals, polychaetes, clams, gastropods, sea urchins, sand dollars, and crabs and shrimp. The deposits also yield the remains of marine vertebrates, such as sharks and rays, bony fish, baleen whales, walruses and dugongs.

Marine environments such as outer and inner shelf, platform reef, and near shore beach and lagoon, are all represented within the "Imperial Formation". As the sea became more shallow, estuarine and brackish marine conditions prevailed, typified by thick channel deposits of oyster and pecten shell coquina that now form the "Elephant Knees" along Fish Creek. Many of the marine fossils are closely related to forms from the Caribbean Sea. They document a time before the Isthmus of Panama formed, when the warm Gulf Stream of the western Atlantic Ocean invaded eastern Pacific Ocean waters.

Terrestrial period

As North and South America connected about three million years ago, terrestrial faunal north-south migrations began on a continental scale called the Great American Interchange, and are present in Anza-Borrego's fossils. Animals such as giant ground sloths and porcupines made their first appearance in North America at this time.

The oldest terrestrial vertebrate fossils from the Colorado Desert predate the late Miocene invasion of the Gulf of California. These very rare fossils, which include a gomphothere (elephant-like mammal), rodent, felid and small camelid, and were collected from 10– to 12-million-year-old riverine and near-shore lake deposits. However, the most significant and abundant vertebrate fossils have been recovered from the latest Miocene through late-Pleistocene riverine and flood plane 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 methods.

The bestiary for this savannah landscape includes some of the most unusual creatures to inhabit North America – animals such as:
Geochelone, a giant bathtub-sized tortoise; Aiolornis incredibilis, the largest flying bird of the Northern Hemisphere, with 17-ft (5.2-m) wing span; Paramylodon, Megalonyx and Nothrotheriops, giant ground sloths, some with bony armor within their skin; Pewelagus, a very small rabbit (paleontologists can name with a sense of humor); Borophagus, a hyena-like dog; Acrtodus, a giant short-faced bear; Smilodon, a saber-toothed cat; Miracinonyx, the North American cheetah; Mammuthus imperator, the largest known mammoth; Tapirus, an extinct tapir; Equus enormis and Equus scotti, two species of extinct Pleistocene horses; Gigantocamelus a giant camel; and Capromeryx minor, the dwarf pronghorn.

Morteros, bedrock mortar grinding holes, in the Indian Hill area

Native Americans

The Native Americans of the surrounding mountains and deserts included the Cahuilla, Cupeño, and Kumeyaay (Diegueño) Indian tribes. It was the homeland of these peoples for thousands of years, and their artists created petroglyph and pictogram rock art expressing their cultures.^[7]

Park interpretive associations

The Anza-Borrego Foundation (ABF), founded in 1967, is a non-profit educational organization and is the sole cooperating association of ABDSP. It manages all sales at the State Park Visitor Center and State Park Store. The Anza-Borrego Institute, the education arm of ABF, 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. ABF's mission is to protect and preserve the natural landscapes, wildlife habitat, and cultural heritage of ABDSP for the benefit and enjoyment of present and future generations.^[8]

Gallery

Flora and fauna of Anza-Borrego Desert Park
Peninsular bighorn sheep in ABDSP
An ocotillo plant common in ABDSP
A desert marigold pushes its way through the dry, cracked, and sun-hardened desert after a rare and substantial rainfall
Common chuckwalla, Sauromalus ater in Palm Canyon, near Palm Springs

References

↑ William Bright; Erwin Gustav Gudde (30 November 1998). 1500 California place names: their origin and meaning. University of California Press. p. 16. ISBN 978-0-520-21271-8. Retrieved 20 January 2012.
↑ http://www.parks.ca.gov/?page_id=1016 . accessed 6/22/2010
↑ "Archived copy". Archived from the original on 2010-06-26. Retrieved 2010-06-27. accessed 6/22/2010
↑ http://www.parks.ca.gov/mediagallery/?page_id=638 . accessed 6/22/2010
↑ C. Michael Hogan. 2009. California Fan Palm: Washingtonia filifera, GlobalTwitcher.com, ed. Nicklas Stromberg
↑ George T. Jefferson and Lowell Lindsay, 2006, Fossil Treasures of the Anza-Borrego Desert, (Sunbelt Publications, San Diego) ISBN 0-932653-50-2
↑ http://www.abdnha.org/04rockart_main.htm . accessed 6/22/2010
↑ "Anza-Borrego Foundation". Archived from the original on 20 June 2010. Retrieved 2010-06-22.

C. Michael Hogan. 2009. California Fan Palm: Washingtonia filifera, GlobalTwitcher.com, ed. Nicklas Stromberg
George T. Jefferson and Lowell Lindsay. 2006. Fossil Treasures of the Anza-Borrego Desert (Sunbelt Publications, San Diego). ISBN 0-932653-50-2

External links

Wikimedia Commons has media related to Anza-Borrego Desert State Park.

Wikivoyage has a travel guide for Anza-Borrego Desert State Park.

Protected areas of California

National Park System

National Parks	Channel Islands Death Valley Joshua Tree Kings Canyon Lassen Volcanic Pinnacles Redwood Sequoia Yosemite

National Preserves	Mojave

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National Historic Sites	Eugene O'Neill Fort Point John Muir Manzanar

National Memorials	Port Chicago Naval Magazine

National Recreation Areas	Golden Gate Santa Monica Mountains Whiskeytown

State Parks

State Parks	Ahjumawi Lava Springs Andrew Molera Angel Island Annadel Año Nuevo Anza-Borrego Desert Arthur B. Ripley Desert Woodland Bidwell–Sacramento River Big Basin Redwoods Border Field Bothe-Napa Valley Burton Creek Butano Calaveras Big Trees Castle Crags Castle Rock Caswell Memorial China Camp Chino Hills Clear Lake Crystal Cove Cuyamaca Rancho D. L. Bliss Del Norte Coast Redwoods Donner Memorial Ed Z'berg Sugar Pine Point Emerald Bay The Forest of Nisene Marks Fort Ord Dunes Fremont Peak Garrapata Gaviota Great Valley Grasslands Grizzly Creek Redwoods Grover Hot Springs Hearst San Simeon Hendy Woods Henry Cowell Redwoods Henry W. Coe Humboldt Lagoons Humboldt Redwoods Jedediah Smith Redwoods Julia Pfeiffer Burns Leo Carrillo Limekiln MacKerricher Malibu Creek Manchester McArthur–Burney Falls Memorial McLaughlin Eastshore Mendocino Headlands Mendocino Woodlands Montaña de Oro Morro Bay Mount Diablo Mount San Jacinto Mount Tamalpais Navarro River Redwoods Pacheco Palomar Mountain Patrick's Point Pfeiffer Big Sur Placerita Canyon Plumas-Eureka Point Mugu Portola Redwoods Prairie Creek Redwoods Red Rock Canyon Richardson Grove Rio de Los Angeles Robert Louis Stevenson Russian Gulch Saddleback Butte Salt Point Samuel P. Taylor San Bruno Mountain Sinkyone Wilderness South Yuba River Sugarloaf Ridge Sutter Buttes Tolowa Dunes Tomales Bay Topanga Van Damme Washoe Meadows Wilder Ranch

State Natural Reserves	Antelope Valley California Poppy Armstrong Redwoods Azalea Caspar Headlands John B. Dewitt John Little Jug Handle Kruse Rhododendron Los Osos Oaks Mailliard Redwoods Mono Lake Tufa Montgomery Woods Point Lobos Smithe Redwoods Torrey Pines Tule Elk

State Marine Reserves	Albany Big Creek Carmel Pinnacles Del Mar Landing Emeryville Crescent Estero de Limantour Fitzgerald Laguna Beach Lovers Point Montara Moro Cojo Slough Natural Bridges Point Lobos Point Sur Russian River Stewarts Point

State Historic Parks	Anderson Marsh Antelope Valley Indian Museum Bale Grist Mill Benicia Capitol Bidwell Mansion Bodie California Citrus California State Indian Museum Chumash Painted Cave Colonel Allensworth Columbia Cowell Ranch/John Marsh El Presidio de Santa Barbara Empire Mine Folsom Powerhouse Fort Humboldt Fort Ross Fort Tejon Governor's Mansion Hearst San Simeon Indian Grinding Rock Jack London La Purísima Mission Leland Stanford Mansion Los Angeles Los Encinos Malakoff Diggins Marconi Conference Center Marshall Gold Discovery Monterey Old Sacramento Old Town San Diego Olompali Petaluma Adobe Pigeon Point Light Station Pío Pico Point Sur Railtown 1897 San Juan Bautista San Pasqual Battlefield Santa Cruz Mission Santa Susana Pass Shasta Sonoma Sutter's Fort Tomo-Kahni Wassama Round House Watts Towers of Simon Rodia Weaverville Joss House Will Rogers William B. Ide Adobe Woodland Opera House

State Beaches	Asilomar Bean Hollow Bolsa Chica Cardiff Carlsbad Carmel River Carpinteria Caspar Headlands Cayucos Corona del Mar Dockweiler Doheny El Capitán Emma Wood Gray Whale Cove Greenwood Half Moon Bay Huntington Leucadia Lighthouse Field Little River Malibu Lagoon Mandalay Manresa Marina McGrath Montara Monterey Moonlight Morro Strand Moss Landing Natural Bridges New Brighton Pacifica Pelican Pescadero Pismo Point Dume Point Sal Pomponio Refugio Robert H. Meyer Memorial Robert W. Crown Memorial Salinas River San Buenaventura San Clemente San Elijo San Gregorio San Onofre Santa Monica Schooner Gulch Seacliff Silver Strand Sonoma Coast South Carlsbad Sunset Thornton Torrey Pines Trinidad Twin Lakes Westport-Union Landing Will Rogers William Randolph Hearst Memorial Zmudowski

State Recreation Areas	Admiral William Standley Auburn Austin Creek Benbow Lake Benicia Bethany Reservoir Brannan Island Candlestick Point Castaic Lake Colusa-Sacramento River Folsom Lake Franks Tract George J. Hatfield Harry A. Merlo Kenneth Hahn Kings Beach Lake Del Valle Lake Oroville Lake Perris Lake Valley Martial Cottle Park McConnell Millerton Lake Picacho Providence Mountains Salton Sea San Luis Reservoir Silverwood Lake Standish-Hickey Tahoe Turlock Lake Woodson Bridge

State Vehicular Recreation Areas	Carnegie Clay Pit Heber Dunes Hollister Hills Hungry Valley Oceano Dunes Ocotillo Wells Prairie City

Other	Burleigh H. Murray Ranch California State Mining and Mineral Museum California State Capitol Museum California State Railroad Museum Castro Adobe Delta Meadows Estero Bay Hatton Canyon Indio Hills Palms Point Cabrillo Light Station Point Lobos Ranch Point Montara Light Station Reynolds Wayside Campground San Timoteo Canyon Stone Lake Verdugo Mountains Ward Creek Wildwood Canyon

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State Forests

Boggs Mountain Demonstration Ellen Pickett Jackson Demonstration Las Posadas LaTour Demonstration Mount Zion Mountain Home Demonstration Soquel Demonstration

National Wildlife Refuges

State Wildlife Areas

Wildlife Areas	Antelope Valley Ash Creek Bass Hill Battle Creek Big Lagoon Big Sandy Biscar Butte Valley Buttermilk Country Cache Creek Camp Cady Cantara/Ney Springs Cedar Roughs Cinder Flats Collins Eddy Colusa Bypass Coon Hollow Cottonwood Creek Crescent City Marsh Crocker Meadows Daugherty Hill Decker Island Doyle Dutch Flat Eastlker River Eel River Elk Creek Wetlands Elk River Fay Slough Feather River Fitzhugh Creek Fremont Weir Grass Lake Gray Lodge Green Creek Grizzly Island Hallelujah Junction Heenan Lake Hill Slough Hollenbeck Canyon Honey Lake Hope Valley Horseshoe Ranch Imperial Indian Valley Kelso Peak and Old Dad Mountains Kinsman Flat Knoxville Laguna Lake Berryessa Lake Earl Lake Sonoma Little Panoche Reservoir Los Banos Lower Sherman Island Mad River Slough Marble Mountains Mendota Merrill's Landing Miner Slough Monache Meadows Morro Bay Moss Landing Mouth of Cottonwood Creek Napa-Sonoma Marshes North Grasslands O'Neill Forebay Oroville Petaluma Marsh Pickel Meadow Pine Creek Point Edith Putah Creek Rector Reservoir Red Lake Rhode Island Sacramento River San Felipe Valley San Jacinto San Luis Obispo San Luis Reservoir San Pablo Bay Santa Rosa Shasta Valley Silver Creek Slinkard/Little Antelope Smithneck Creek South Fork Spenceville Surprise Valley Sutter Bypass Tehama Truckee River Upper Butte Basin Volta Warner Valley Waukell Creek West Hilmar Westlker River White Slough Willow Creek Yolo Bypass

Ecological Reserves	Albany Mudflats Alkali Sink Allensworth Atascadero Creek Marsh Bair Island Baldwin Lake Batiquitos Lagoon Blue Sky Boden Canyon Boggs Lake Bolsa Chica Bonny Doon Buena Vista Lagoon Butler Slough Butte Creek Canyon Butte Creek House Buttonwillow By Day Creek Calhoun Cut Canebrake Carlsbad Highlands Carmel Bay Carrizo Canyon Carrizo Plains China Point Clover Creek Coachella Valley Coal Canyon Corte Madera Marsh Crestridge Dairy Mart Ponds Dales Lake Del Mar Landing Eden Landing Elkhorn Slough Estelle Mountain Fall River Mills Fish Slough Fremont Valley Goleta Slough Indian Joe Spring Kaweah Kerman King Clone Laguna Laurel Loch Lomond Vernal Pool Lokern Magnesia Spring Marin Islands Mattole River McGinty Mountain Morro Dunes Morro Rock Napa River North Table Mountain Oasis Spring Panoche Hills Peytonia Slough Pine Hill Piute Creek Pleasant Valley Rancho Jamul Redwood Shores River Springs Lakes Saline Valley San Dieguito Lagoon San Elijo Lagoon San Felipe Creek San Joaquin River Santa Rosa Plateau Springville Stone Corral Sycamore Canyon Sycuan Peak Thomes Creek Tomales Bay Upper Newport Bay Watsonville Slough West Mojave Desert Woodbridge Yaudanchi

Marine Protected Areas	Abalone Cove Albany Mudflats Anacapa Anacapa Año Nuevo Asilomar Atascadero Beach Bair Island Batiquitos Lagoon Big Creek Big Creek Big Sycamore Canyon Bodega Bolsa Chica Cambria Cardiff and San Elijo Carmel Bay Carmel Pinnacles Carrington Point Catalina Marine Science Center Corte Madera Marsh Crystal Cove Dana Point Del Mar Landing Doheny Doheny Duxbury Reef Edward F. Ricketts Elkhorn Slough Elkhorn Slough Encinitas Estero de Limantour Fagan Marsh Farallon Islands Farnsworth Bank Fort Ross Gerstle Cove Goleta Slough Greyhound Rock Gull Island Harris Point Heisler Park Hopkins Irvine Coast James V. Fitzgerald Judith Rock Julia Pfeiffer Burns La Jolla Laguna Beach Lovers Cove (Catalina Island) Lovers Point MacKerricher Manchester and Arena Rock Marin Islands Mia J. Tegner Moro Cojo Slough Morro Bay Morro Bay Morro Beach Natural Bridges Niguel Pacific Grove Marine Gardens Painted Cave Peytonia Slough Piedras Blancas Piedras Blancas Pismo Pismo-Oceano Beach Point Buchon Point Buchon Point Cabrillo Point Fermin Point Lobos Point Reyes Headlands Point Sur Point Sur Portuguese Ledge Punta Gorda Redwood Shores Refugio Richardson Rock Robert E. Badham Robert W. Crown Russian Gulch Russian River Salt Point San Diego-Scripps San Dieguito Lagoon San Elijo Lagoon Santa Barbara Island Scorpion Skunk Point Sonoma Coast Soquel Canyon South Laguna Beach South Point Swami’s Tomales Bay Upper Newport Bay Van Damme Vandenberg White Rock (Cambria)

Bureau of Land Management National Landscape Conservation System

National Monuments	Berryessa Snow Mountain California Coastal Carrizo Plain Fort Ord Mojave Trails Sand to Snow Santa Rosa and San Jacinto Mountains

National Conservation Areas	California Desert King Range

Wilderness Areas	Argus Range Big Maria Mountains Bigelow Cholla Garden Bighorn Mountain Black Mountain Bright Star Bristol Mountains Cadiz Dunes Carrizo Gorge Chemehuevi Mountains Chimney Peak Chuckwalla Mountains Chumash Cleghorn Lakes Clipper Mountain Coso Range Coyote Mountains Darwin Falls Dead Mountains Dick Smith El Paso Mountains Fish Creek Mountains Funeral Mountains Golden Valley Grass Valley Headwaters Forest Reserve Hollow Hills Ibex Indian Pass Inyo Mountains Jacumba Kelso Dunes Kiavah Kingston Range Little Chuckwalla Mountains Little Picacho Machesna Mountain Matilija Malpais Mesa Manly Peak Mecca Hills Mesquite Newberry Mountains Nopah Range North Algodones Dunes North Mesquite Mountains Old Woman Mountains Orocopia Mountains Otay Mountain Owens Peak Pahrump Valley Palen/McCoy Palo Verde Mountains Picacho Peak Piper Mountain Piute Mountains Red Buttes Resting Spring Range Rice Valley Riverside Mountains Rodman Mountains Sacatar Trail Saddle Peak Hills San Gorgonio Santa Lucia Santa Rosa Sawtooth Mountains Sespe Sheephole Valley South Nopah Range Stateline Stepladder Mountains Surprise Canyon Sylvania Mountains Trilobite Turtle Mountains Whipple Mountains

National Marine Sanctuaries

Channel Islands Cordell Bank Greater Farallones Monterey Bay

National Estuarine Research Reserves

Elkhorn Slough San Francisco Bay Tijuana River Estuary

University of California Natural Reserve System

Angelo Coast Range Reserve
Año Nuevo Island
Blue Oak Ranch Reserve
Bodega Marine
Box Springs
Boyd Deep Canyon Desert Research Center
Burns Piñon Ridge
Carpinteria Salt Marsh
Chickering American River
Coal Oil Point
Dawson Los Monos Canyon
Eagle Lake Field Station
Elliott Chaparral
Emerson Oaks
Fort Ord
Hastings
James San Jacinto Mountains
Jenny Pygmy Forest
Jepson Prairie
Kendall-Frost Mission Bay Marsh
Kenneth S. Norris Rancho Marino
Landels-Hill Big Creek
McLaughlin
Motte Rimrock
Quail Ridge
Sagehen Creek Field Station
San Joaquin Freshwater Marsh
Santa Cruz Island
Scripps Coastal
Sedgwick
Stebbins Cold Canyon
Steele Burnand Anza-Borrego
Stunt Ranch Santa Monica Mountains
Sweeney Granite Mountains Desert Research Center
Valentine Eastern Sierra
Younger Lagoon

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Regions	Antelope Valley Big Sur California Coast Ranges Cascade Range Central California Central Coast Central Valley Channel Islands Coachella Valley Coastal California Conejo Valley Cucamonga Valley Death Valley East Bay (SF Bay Area) East County (SD) Eastern California Emerald Triangle Gold Country Great Basin Greater San Bernardino Inland Empire Klamath Basin Lake Tahoe Greater Los Angeles Los Angeles Basin Lost Coast Mojave Desert Mountain Empire North Bay (SF) North Coast North Coast (SD) Northern California Owens Valley Oxnard Plain Peninsular Ranges Pomona Valley Sacramento Valley Salinas Valley San Fernando Valley San Francisco Bay Area San Francisco Peninsula San Gabriel Valley San Joaquin Valley Santa Clara Valley Santa Clara River Valley Santa Clarita Valley Santa Ynez Valley Shasta Cascade Sierra Nevada Silicon Valley South Bay (LA) South Bay (SD) South Bay (SF) South Coast Southern Border Region Southern California Tech Coast Transverse Ranges Tri-Valley Victor Valley Wine Country

Metro regions	Metropolitan Fresno Los Angeles metropolitan area Greater Sacramento San Bernardino-Riverside metropolitan area San Francisco metropolitan area San Diego–Tijuana

Counties	Alameda Alpine Amador Butte Calaveras Colusa Contra Costa Del Norte El Dorado Fresno Glenn Humboldt Imperial Inyo Kern Kings Lake Lassen Los Angeles Madera Marin Mariposa Mendocino Merced Modoc Mono Monterey Napa Nevada Orange Placer Plumas Riverside Sacramento San Benito San Bernardino San Diego San Francisco San Joaquin San Luis Obispo San Mateo Santa Barbara Santa Clara Santa Cruz Shasta Sierra Siskiyou Solano Sonoma Stanislaus Sutter Tehama Trinity Tulare Tuolumne Ventura Yolo Yuba

Most populous cities	Los Angeles San Diego San Jose San Francisco Fresno Sacramento Long Beach Oakland Bakersfield Anaheim

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