The Santa Susana Pass, originally Simi Pass, is a low

mountain pass A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both Human migration, human a ...

in the

Simi Hills The Simi Hills are a low rocky mountain range of the Transverse Ranges in eastern Ventura County and western Los Angeles County, of southern California, United States. Geography The Simi Hills are aligned east-west and run for , and average arou ...

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 ...

, connecting the

San Fernando Valley The San Fernando Valley, known locally as the Valley, is an urbanized valley in Los Angeles County, California. Located to the north of the Los Angeles Basin, it contains a large portion of the City of Los Angeles, as well as unincorporated ar ...

and

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' ...

neighborhood of Chatsworth, to the city of

Simi Valley Simi Valley (; Chumash: ''Shimiyi'') is a city in the valley of the same name in the southeast region of Ventura County, California, United States. Simi Valley is from Downtown Los Angeles, making it part of the Greater Los Angeles Area. The ...

and eponymous valley. It has been featured in numerous movies, including ''

Shooting High ''Shooting High'' is a 1940 American Western film directed by Alfred E. Green and starring Jane Withers, Gene Autry, and Marjorie Weaver. Written by Lou Breslow and Owen Francis, the film is about a generations-old feud between two families. Th ...

'' (1940), '' Man's Genesis'' (1912), ''

Judith of Bethulia ''Judith of Bethulia'' (1914 in film, 1914) is an American film starring Blanche Sweet and Henry B. Walthall, and produced and directed by D. W. Griffith, based on the play "Judith and the Holofernes" (1896) by Thomas Bailey Aldrich, which itself ...

'' (1914), ''

Jack and the Beanstalk "Jack and the Beanstalk" is an English fairy tale. It appeared as "The Story of Jack Spriggins and the Enchanted Bean" in 1734 4th edition On Commons and as Benjamin Tabart's moralized "The History of Jack and the Bean-Stalk" in 1807. Henry Cole ...

'' (1917) and ''

Range Warfare ''Range Warfare'' is a 1934 American Western film directed by S. Roy Luby. Cast *Lafayette Russell as Reb Russell, aka The Whistler *Rebel as Rebel, Reb's Horse * Lucille Lund as Sue Callahan *Hal Taliaferro as Tommy Lord *Roger Williams as ...

'' (1935).

Natural history

The pass is the division between the

to the south 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 Cla ...

to the north, and forms the most critical

wildlife corridor A wildlife corridor, habitat corridor, or green corridor is an area of habitat connecting wildlife populations separated by human activities or structures (such as roads, development, or logging). This allows an exchange of individuals between ...

and habitat linkage between them. The scenery is made up of

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...

formations in massive outcroppings and numerous boulders, with

California chaparral and woodlands The California chaparral and woodlands is a terrestrial ecoregion of southwestern Oregon, northern, central, and southern California (United States) and northwestern Baja California (Mexico), located on the west coast of North America. It is a ...

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 ...

, with

oak savannahs An oak savanna is a type of savanna—or lightly forested grassland—where oaks (''Quercus ''spp.) are the dominant trees. The terms "oakery" or "woodlands" are also used commonly, though the former is more prevalent when referencing the Mediter ...

, chaparral shrub forest, and native bunchgrass plant communities in between. The perennial water sources provide diverse habitat for birds, mammals, and reptiles.

History

Native American

The Santa Susana Pass was at the juncture of the Native American Tongva-Fernandeño, Chumash-Venturaño, and Tataviam-Fernandeño tribal lands and was first crossed by their trail route, and used for an estimated 8,000 years.

Under Spain and Mexico

The first Europeans to use the pass were members of the Spanish Portolà expedition (1769–1770), the first European land entry and exploration of the present-day state of

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

. The expedition traversed the pass on January 15, 1770, heading east to a campground that later became part of

Mission San Fernando Rey de España Mission San Fernando Rey de España is a Spanish mission in the Mission Hills community of Los Angeles, California. The mission was founded on 8 September 1797 at the site of Achooykomenga, and was the seventeenth of the twenty-one Spanish mis ...

. After secularization of the mission in 1834, San Fernando Valley rancheros used the trail. A rough wagon road evolved.

Early statehood

American newspapers in California first referred to the pass as Simi Pass from 1857 when the ''

Los Angeles Star ''Los Angeles Star'' (''La Estrella de Los Angeles'') was the first newspaper in Los Angeles, California, U.S. The publication ran from 1851 to 1879. History Early history and background The first proposition to establish a newspaper in Los ...

'' wrote of the capture of the outlaw Juan Flores there. That name continued in use, declining from the late 1880s until 1911 in the ''Eagle Rock Sentinel''. It began to be referred to as Santa Susana Pass in the ''

Los Angeles Herald The ''Los Angeles Herald'' or the ''Evening Herald'' was a newspaper published in Los Angeles in the late 19th and early 20th centuries. Founded in 1873 by Charles A. Storke, the newspaper was acquired by William Randolph Hearst in 1931. It ...

'' 18 September 1887, being used with increasing frequency thereafter. In 1859, the California Legislature appropriated $15,000 (with additional funding provided by Los Angeles and Santa Barbara Counties) towards improving the old wagon road into a new stagecoach road, now known as the

Old Santa Susana Stage Road The Old Santa Susana Stage Road, or Santa Susana Wagon Road, is a route taken by early travelers between the San Fernando Valley and Simi Valley near Chatsworth, California, via the Santa Susana Pass. The main route climbs through what is now the ...

.Old Stagecoach Trail at ''www.trails.com''
/ref>Link, Tom: ''Universal City – North Hollywood, a Centenniel Portrait'', Windsor Publications, 1991, , p. 25 The precipitous portion of the route down from the summit on the San Fernando Valley side was called the Devil's Slide; horses were usually blindfolded and chains were used to augment brakes on the steep descent. Passengers debarked and walked. The outbreak of the American Civil War in 1861 disrupted mail service along 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 ...

's southern stagecoach route from

St. Louis, Missouri St. Louis () is the second-largest city in Missouri, United States. It sits near the confluence of the Mississippi River, Mississippi and the Missouri Rivers. In 2020, the city proper had a population of 301,578, while the Greater St. Louis, ...

via

El Paso El Paso (; "the pass") is a city in and the seat of El Paso County in the western corner of the U.S. state of Texas. The 2020 population of the city from the U.S. Census Bureau was 678,815, making it the 23rd-largest city in the U.S., the s ...

Fort Yuma Fort Yuma was a fort in California located in Imperial County, across the Colorado River from Yuma, Arizona. It was on the Butterfield Overland Mail route from 1858 until 1861 and was abandoned May 16, 1883, and transferred to the Department of ...

and Los Angeles and on to San Francisco via 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 Califor ...

, which had begun its run in 1858. To compensate, the government contracted the Butterfield Company to carry mail between

and

San Francisco San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of Ca ...

via the new wagon road over the Santa Susana Pass. The first overland mail stage run through the pass took place on April 6, 1861. The main route climbs through what is now

Santa Susana Pass State Historic Park Santa Susana Pass State Historic Park is a California State Park of approximately located on the boundary between Ventura and Los Angeles counties, between the communities of Chatsworth and Simi Valley. Geologically, the park is located where ...

, with a branch in L.A. City Park 'Chatsworth Park South.' It was an important artery linking the

Los Angeles Basin The Los Angeles Basin is a sedimentary basin located in Southern California, in a region known as the Peninsular Ranges. The basin is also connected to an anomalous group of east-west trending chains of mountains collectively known as the Tr ...

and inland

Ventura County Ventura County () is a county in the southern part of the U.S. state of California. As of the 2020 census, the population was 843,843. The largest city is Oxnard, and the county seat is the city of Ventura. Ventura County comprises the Oxnar ...

, and was part of the main route for travel by

stagecoach A stagecoach is a four-wheeled public transport coach used to carry paying passengers and light packages on journeys long enough to need a change of horses. It is strongly sprung and generally drawn by four horses although some versions are draw ...

between Los Angeles and San Francisco from 1861 until the opening of rail traffic between the cities in 1876. The

is listed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

. Part of the stage road is also a Historic-Cultural Monument of Ventura County and of the City of Los Angeles under the name 'Old Stagecoach Trail.'

Late 19th and 20th century

A new wagon route bypassing the deteriorating Devil's Slide was opened in 1895 to the north . Initially called ''El Camino Nuevo'' (the New Road), it was later named the Chatsworth Grade Road, which continued in use until Santa Susana Pass Road (now Old Santa Susana Pass Road) was built in 1917. This was the first automobile route between the San Fernando and Simi Valleys. It also was the main northbound 'coast road' to Santa Barbara and

, until the Conejo Grade in

between

Conejo Valley The Conejo Valley is a region spanning both southeastern Ventura County and northwestern Los Angeles County in Southern California, United States. It is located in the northwestern part of the Greater Los Angeles Area. Communities in the Conejo ...

and the

Oxnard Plain The Oxnard Plain is a large coastal plain in southwest Ventura County, California, United States surrounded by the mountains of the Transverse ranges. The cities of Oxnard, Camarillo, Port Hueneme and much of Ventura as well as the unincorpora ...

on "Camino Real Viejo" (the Old Royal Road, now

U.S. Route 101 U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Roa ...

), was improved. In 1968

State Route 118 Route 118 or Highway 118 can refer to multiple roads: Argentina * National Route 118 (Argentina), National Route 118 Canada * British Columbia Highway 118 * New Brunswick Route 118 * Nova Scotia Highway 118 * Ontario Highway 118 * Prince ...

, the "Simi Valley–San Fernando Valley Freeway" opened, north of the old auto road as the latest route across the Pass. In 1994 it was renamed the "Ronald Reagan Freeway". The pass area became famous from being seen in many movies, primarily

Westerns The Western is a genre set in the American frontier and commonly associated with folk tales of the Western United States, particularly the Southwestern United States, as well as Northern Mexico and Western Canada. It is commonly referred ...

, filmed from the 1920s to the 1950s here at the Spahn, Iverson, Bell Moving Picture, and

Corriganville __NOTOC__ Corriganville Movie Ranch was a working film studio and movie ranch for outdoor location shooting, as well as a Western-themed tourist attraction. The ranch, owned by actor and stuntman Ray "Crash" Corrigan, was located in the foothil ...

Movie Ranches A movie ranch is a ranch that is at least partially dedicated for use as a set in the creation and production of motion pictures and television shows. These were developed in the United States in southern California, because of the climate. The fir ...

. The area became infamous in the late 1960s with the Manson Family headquartered at the Spahn Ranch, near the top of the stage road's Devil's Slide. To the south of the old stage road is

Sage Ranch Park Sage Ranch Park is a and wildlife corridor located at a height in the northwestern Simi Hills on the northwestern plateau of the Simi Valley, bordering Los Angeles County and its San Fernando Valley.Stone, Robert (1998). ''Day Hikes in Ventur ...

and the

Santa Susana Field Laboratory The Santa Susana Field Laboratory (SSFL), formerly known as Rocketdyne, is a complex of industrial research and development facilities located on a portion of Southern California in an unincorporated area of Ventura County in the Simi Hills betw ...

. Immediately to the north of Route 118 at the pass top is Rocky Peak Park, a part of the Rim of the Valley Trail Corridor. The old wagon road and rocky hill environs are part of the

, for public exploration.http://www.lamountains.com/parks.asp?parkid=123 LAMountains.com – Santa Susana Pass State Historic Park. access date: 4/4/2010. The

Southern Pacific Railroad The Southern Pacific (or Espee from the railroad initials- SP) was an American Class I railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was operated by various companies under the ...

began construction of three railroad tunnels through the pass in 1900 and opened the route in 1904. The railroad built the Santa Susana Depot in

Rancho Simi Rancho Simi, also known as Rancho San José de Nuestra Señora de Altagracia y Simí, was a Spanish land grant in what is now eastern Ventura and western Los Angeles counties granted in 1795 to Santiago Pico, founder of the Pico family of Cal ...

on Los Angeles Avenue at Tapo Street in 1903.

References

External links

California State Parks Dept. – Santa Susana Pass State Historic Park

LAMountains.com – Santa Susana Pass State Historic Park

LAMountains.com – Sage Ranch Park

LAMountains.com – Corriganville Park

LAMountains.com – Rocky Peak Park

{{California history Santa Susana Mountains Simi Hills California Historical Landmarks California State Historic Parks Geography of Simi Valley, California Historic trails and roads in California History of Simi Valley, California History of the San Fernando Valley Landforms of Los Angeles County, California Landforms of Ventura County, California Landmarks in California Los Angeles Historic-Cultural Monuments Mountain passes of California Native American trails in the United States Parks in Los Angeles San Fernando Valley Trails and roads in the American Old West Native American history of California