Upper Las Virgenes Canyon Open Space Preserve

(Redirected from Ahmanson Ranch) Nature reserve in California, United States

Upper Las Virgenes Canyon Open Space Preserve
Oak Tree at Upper Las Virgenes Canyon Preserve
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Coordinates	34°11′03″N 118°42′06″W / 34.184187°N 118.701538°W / 34.184187; -118.701538
Area	2,983 acres (12.07 km)
Established	2003
Governing body	Santa Monica Mountains Conservancy

The Upper Las Virgenes Canyon Open Space Preserve is a large open space nature preserve owned and operated by the Santa Monica Mountains Conservancy spanning nearly 3,000 acres (1,200 ha) in the Simi Hills of western Los Angeles County and eastern Ventura County.

Originally part of Ahmanson Ranch, this area was sold by Seattle-based Washington Mutual to the Santa Monica Mountains Conservancy in late 2003 after lengthy issues concerning development in the chaparral shrub forest and oak savanna understory and overstory Plant communities. It was previously called Ahmanson Ranch Park.

History

Pre-1963

For thousands of years the Chumash Native American tribe lived in the current Preserve's area. The Chumash had, prior to European involvement, at least one village on the land, Huwam, a multi-cultural village where Chumash, Tongva, and Tataviam peoples lived. On Bell Creek beside Escorpión Peak (Castle Peak) a large rocky mountain on the property of El Escorpion Park, is the reported site of this village. The peak is one of nine alignment points in Chumash territory and is essential to maintaining the balance of the natural world. A cave known as The Cave of Munits exists just inside the property. This is the believed cave of a mythical Chumash shaman who was killed after murdering the son of a Chumash chief. This cave also appeared in the films The Canyon of Missing Men (1930) and Tarzan and the Golden Lion (1927).

The 1769 Juan Bautista de Anza expedition, the first European exploration by land of Las Californias, passed by the area. The U.S. National Park service's Juan Bautista de Anza National Historic Trail goes through the Preserve, entering from the east in Moore Canyon from El Escorpion Park and Vanowen Street and leaving in the west into the Santa Monica Mountains National Recreation Area's Cheeseboro & Palo Comado Canyons section. The Rancho El Escorpión was an 1845 Mexican land grant named after the Peak, and was adjacent on the northeast side of the Preserve. From the 1920s to the 1950s many Westerns and other types of motion pictures were filmed here at the Lasky Mesa movie ranch area.

1963-2003

In 1963, Home Savings of America obtained the property that was then called Ahmanson Ranch. It sat unused, with no plans for development, until 1989 when Home Savings of America announced their plans for the 5,400 acres (22 km) property. The plans included over 3,000 homes, two golf courses, and 400,000 square feet (40,000 m) of commercial and residential space. However, in 1998, Home Savings of America was bought by Washington Mutual for $6.4 billion. In 2003 the Santa Monica Mountains Conservancy purchased the land from WAMU for an open space preserve and nature reserve Park.

2003-Present

On September 28, 2005, the Topanga Canyon Fire broke out between the west-bound State Route 118 and Topanga Canyon Boulevard. By September 29, the fire had reached the Preserve, and burned a large portion of the park near, and including, El Escorpion Park. By October 3, 2005, the fire had been contained. A total of 24,175 acres (100 km) were burned, and it cost over $8 million to contain and extinguish the fire. The effects of the fire were visible in the park, as much of the chaparral and grasslands were burned away, and Oak tree canopies burned off. Since the California native plants have evolved with wildfires, from their basal roots, seeds, and branches they re-sprouted the following fall and winter exhibiting new growth by the next spring.

It sustained severe damage during the Woolsey Fire of 2018.

Access

Trailheads

There are two preserve trailheads at which people can access the park.

Victory Trailhead

Located at the western end of Victory Blvd. in West Hills, the Victory Trailhead is the main trailhead for the Preserve. It features a large gravel parking lot with a Portable Toilet that is cleaned at least weekly. The parking lot has room for buses and equestrian trailers. Parking is $3 for the day. Parking passes are available through The Santa Monica Mountains Conservancy website. Multi-park 5- and 7-day and single park 7-day passes are available. Parking is also available outside the park gates on Victory Blvd., Gilmore St., and Country Oak Rd. A bulletin board featuring information on the Santa Monica Mountains Conservancy and recent park and system information is located in the parking lot. There are two picnic tables just inside the park and a large informational display featuring the history, geography, and wildlife of the Preserve.

Las Virgenes Canyon Road Trailhead

This trailhead is located west of Calabasas and north of the Ventura Freeway (U.S. Route 101) on Las Virgenes Canyon Road, at the end of the road. Parking is provided, with a large informational display featuring the history, geography, and wildlife of the Preserve.

Trails

There are several primary trails through which people can access the park.

1. The Victory Trailhead has a junction with two main trails. The first goes due west through the Preserve directly to Upper Las Virgenes Canyon and the trails of Cheeseboro/Palo Comado Canyon Park in the Santa Monica Mountains National Recreation Area. The second goes south through the Preserve to the Laskey Mesa area, and then on to Upper Las Virgenes Canyon.
2. The Las Virgenes Road Trailhead's main trail heads into Upper Las Virgenes Canyon, with junctions for trails to Laskey Mesa and to Cheeseboro/Palo Comado Canyon Park, or continuing on north to the Bell Canyon area.
3. The El Escorpión Trail, runs from L.A. City's El Escorpión Park at the west end of Vanowen Street near Valley Circle Boulevard in West Hills through the preserve to the Victory Trailhead. The trail runs through Moore's Canyon past the Cave of Munits, has a gentle slope, and can be taken in either direction. L.A. City's Bell Canyon Park is directly adjacent to the north of these two parks, with one trail along Bell Creek and others connecting southward.

These trails are available for walking, hiking, mountain biking, and equestrian use during the hours of daylight (sunrise to sunset), 7 days a week. Evening access is permitted for park scheduled event participants only. Unauthorized motor vehicles and motorbikes are not permitted.

Preparations

Visitors should bring basic supplies when exploring the Preserve. For example: two hikers needed to be rescued by the Los Angeles County Sheriff's Department in 2007 after becoming lost while on the trails and paths. Although experienced hikers, and being well-equipped for the hike, the two veered off a path that had been obscured by recent fires and were unable to find their way back to a trail. One was suffering from hypothermia so the other used a cell phone to call 911, and they were rescued later that day. Guided walks, hikes, and evening programs are offered in the park by the Santa Monica Mountains National Recreation Area.

Dogs on 6-foot leashes under the immediate control of the owner are allowed on the designated trails.

See more

References

^ LAMountains.com ULVCOSP webpage
"Wishtoyo on Ahmanson Ranch". Archived from the original on March 13, 2009. Retrieved March 24, 2010.
Schneider, Jerry L. (2016). Western Filming Locations Book 5. CP Entertainment Books. Page 20. ISBN 9780692564417.
http://www.nps.gov/juba/ NPS: Juan Bautista de Anza National Historic Trail
"Upper las Virgenes Open Space (Ahmanson Ranch) Trail Map and Descriptions".
Pols, Mary F. (March 17, 1996). "Foes of Ahmanson Plan Turn to Public for Support". Los Angeles Times. Retrieved April 29, 2022.
Ahmanson Ranch Development, Akiko Allison Gotoh, March 5, 1997
Morris, K: "Ahmanson: Parity Lost", Business Week
FireRescue1 Topanga Canyon Fire report
California native plants#Common Grasses of California
http://www.nps.gov/samo/planyourvisit/cheeseboropalocomado.htm Cheeseboro/Palo Comado Canyon Park
http://www.lamountains.com/parks.asp?parkid=83 Cheeseboro Park
http://www.recreationparks.net/CA/los-angeles/el-escorpion-park-los-angeles El Escorpión Park
http://www.recreationparks.net/CA/los-angeles/bell-canyon-park-los-angeles Bell Canyon Park
^ "Upcoming Events".
Loesing, J: "Father and son rescued while hiking", The Acorn, December 27, 2007. Accessed January 4, 2008.
"Parks".

External links

L.A.Mountains: official Upper Las Virgenes Canyon Open Space Preserve website — information + images + park map
Directions and trail access in short video on Upper Las Virgenes Canyon Open Space Preserve
Ventura County Trails.org: Ahmanson Ranch Preserve — info + trails map.
L.A.Mountains: Park Geology information for Upper Las Virgenes Canyon
moviesites.org Moviesites.org: Laskey Mesa movie history information
Ahmanson.org - History of the 'Save the Ahmanson Ranch' preservation effort — info—images from Save Open Space.
Save Open Space - local open space preservation group — lead group in saving Ahmanson Ranch.
NPS: official Cheeseboro Canyon—Palo Comado Canyon Parks website — information + images + map
L.A.Mountains: Cheeseboro Canyon Park — information + images + map
National Park Service: Anza Historic Trail - homepage — official Juan Bautista de Anza National Historic Trail website.

Protected areas of California

National Park System

Parks	Channel Islands Death Valley Joshua Tree Kings Canyon Lassen Volcanic Pinnacles Redwood Sequoia Yosemite
Preserves	Mojave
Monuments	Cabrillo Castle Mountains César E. Chávez Devils Postpile Lava Beds Muir Woods Tule Lake
Seashores	Point Reyes
Historical Parks	Rosie the Riveter World War II Home Front San Francisco Maritime
Historic Sites	Eugene O'Neill Fort Point John Muir Manzanar
Memorials	Port Chicago Naval Magazine
Recreation Areas	Golden Gate Santa Monica Mountains Whiskeytown–Shasta–Trinity

California State Parks

Parks	Ahjumawi Lava Springs Andrew Molera Angel Island 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 Coast Dairies Crystal Cove Cuyamaca Rancho D. L. Bliss Del Norte Coast Redwoods Donner Memorial Dos Rios 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 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 Sue-meg Sugarloaf Ridge Sutter Buttes Tolowa Dunes Tomales Bay Topanga Trione-Annadel Van Damme Washoe Meadows Wilder Ranch
Natural Reserves	Antelope Valley California Poppy Armstrong Redwoods Azalea Caspar Headlands John B. Dewitt Redwoods John Little Jug Handle Kruse Rhododendron Los Osos Oaks Mailliard Redwoods Mono Lake Tufa Montgomery Woods Point Lobos Smithe Redwoods Torrey Pines Tule Elk
Marine Reserves	Albany Anacapa Island SMR Asilomar Begg Rock Big Creek Bodega Head Cabrillo Carmel Pinnacles Carrington Point Del Mar Landing Elkhorn Slough Emeryville Crescent Estero de Limantour and Drakes Estero Fitzgerald Gerstle Cove Gull Island Harris Point Judith Rock Laguna Beach Long Point Lovers Point Montara and Pillar Point Moro Cojo Slough Morro Bay Natural Bridges Piedras Blancas Point Arena Point Buchon Point Cabrillo Point Dume Point Lobos Point Reyes Point Sur Richardson Rock Russian River Santa Barbara Island Scorpion Sea Lion Gulch Skunk Point South Cape Mendocino Stewarts Point Vandenberg
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 El Presidio de Santa Barbara Empire Mine Folsom Powerhouse Fort Humboldt Fort Ross Fort Tejon Governor's Mansion Hearst Castle Indian Grinding Rock Jack London La Purísima Mission Leland Stanford Mansion Los Angeles Los Encinos Malakoff Diggins Marconi Conference Center Marsh Creek Marshall Gold Discovery Monterey Old Sacramento Old Town San Diego Olompali Pigeon Point Light Station Pío Pico Point Sur Railtown 1897 Rancho Petaluma Adobe San Juan Bautista San Pasqual Battlefield Santa Cruz Mission Santa Susana Pass Shasta Sonoma Sutter's Fort Tomo-Kahni Wassama Round House Watts Towers Weaverville Joss House Will Rogers William B. Ide Adobe Woodland Opera House
Beaches	Asilomar Bean Hollow Bolsa Chica Cardiff Carlsbad Carmel River Carpinteria Caspar Headlands Cayucos Corona del Mar Crown Memorial 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 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
Recreation Areas	Admiral William Standley Auburn Austin Creek Benbow 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 McConnell Millerton Lake Picacho Providence Mountains Salton Sea San Luis Reservoir Silverwood Lake Standish-Hickey Tahoe Turlock Lake Woodson Bridge
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 Capitol Museum California State Mining and Mineral Museum California State Railroad Museum Castro Adobe Delta Meadows Estero Bay Hatton Canyon Indio Hills Palms Point Cabrillo Light Ishxenta State Park Point Montara Light Reynolds Wayside Campground San Timoteo Canyon Stone Lake Verdugo Mountains Ward Creek Wildwood Canyon

National Forests and Grasslands

National Forests and Grasslands	Angeles Butte Valley NG Cleveland Eldorado Humboldt–Toiyabe Inyo Klamath Lake Tahoe Basin Lassen Los Padres Mendocino Modoc Plumas Rogue River–Siskiyou San Bernardino Sequoia Shasta–Trinity Sierra Six Rivers Stanislaus Tahoe
National Wilderness Preservation System	Agua Tibia Ansel Adams Bucks Lake Caribou Carson–Iceberg Castle Crags Cucamonga Desolation Dick Smith Dinkey Lakes Emigrant Golden Trout Hoover Inyo Mountains Ishi Jennie Lakes John Muir Kaiser Marble Mountain Mokelumne Mount Lassic Mount Shasta North Fork Pine Creek San Gabriel San Jacinto San Rafael Sanhedrin Sespe Siskiyou Snow Mountain South Fork Eel River South Sierra South Warner Thousand Lakes Trinity Alps Ventana Yolla Bolly–Middle Eel Yuki
National Monuments and Recreation Areas	Giant Sequoia National Monument San Gabriel Mountains National Monument Sand to Snow National Monument Santa Rosa and San Jacinto Mountains National Monument Smith River National Recreation Area Whiskeytown–Shasta–Trinity National Recreation Area

State Forests
Boggs Mountain Demonstration Ellen Pickett Jackson Demonstration Las Posadas LaTour Demonstration Mount Zion Demonstration 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 Phoenix Vernal Pools 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 and Point Vicente Anacapa Island SMCA Año Nuevo Arrow Point to Lion Head Point Batiquitos Lagoon Big Creek Bodega Head Bolsa Chica Cambria Campus Point Carmel Bay Cat Harbor Crystal Cove Dana Point Duxbury Reef Edward F. Ricketts Elkhorn Slough Estero Americano Estero de Limantour and Drakes Estero Estero de San Antonio Fagan Marsh Famosa Slough Farnsworth Onshore and Offshore Goleta Slough Greyhound Rock Lovers Cove and Casino Point MacKerricher Marin Islands Morro Bay Naples Pacific Grove Marine Gardens Painted Cave Piedras Blancas Point Arena Point Buchon Point Dume Point Reyes Point Sur Portuguese Ledge Pyramid Point Robert E. Badham Robert W. Crown Russian Gulch Russian River Salt Point San Diego-Scripps San Dieguito Lagoon San Elijo Lagoon Saunders Reef Sea Lion Cove Sonoma Coast Soquel Canyon South La Jolla South Point Southeast Farallon Island Stewarts Point Swami's Tijuana River Mouth Upper Newport Bay Van Damme Vandenberg White Rock (Cambria)

Bureau of Land Management National Conservation Lands

National Monuments	Berryessa Snow Mountain California Coastal Carrizo Plain Cascade–Siskiyou 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 Chanchelulla 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 Garcia 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 Malpais Mesa Manly Peak Matilija 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 Chumash Heritage Cordell Bank Greater Farallones Monterey Bay

National Estuarine Research Reserves
Elkhorn Slough San Francisco Bay Tijuana River

University of California Natural Reserve System

Private Conservation Land Trusts

Heritage registers: National Natural Landmarks

v t e West Hills, Los Angeles
Education
Primary and secondary schools	Los Angeles USD Las Virgenes USD Chaminade College Prep middle school de Toledo High School (formerly New Community Jewish HS) West Valley Christian School
Other education	Los Angeles Community College District Los Angeles Public Library
Other
Landmarks	Bell Canyon Park El Escorpión Park Fallbrook Center Upper Las Virgenes Canyon Open Space Preserve Orcutt Ranch Horticulture Center
This list is incomplete.

v t e Woodland Hills, Los Angeles
Geography
Areas	Warner Center
Education
Primary and secondary schools	Los Angeles Unified School District El Camino Real Charter High School William Howard Taft Charter High School Louisville High School
Other education	Los Angeles Community College District Los Angeles Pierce College Los Angeles Public Library
Other
Landmarks	Motion Picture & Television Country House and Hospital Warner Center Los Angeles Metro station
This list is incomplete.

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