Santa Susana Pass State Historic Park, State Historic Park in Chatsworth, Los Angeles, US

Santa Susana Pass State Historic Park covers 670.68 acres where the Simi Hills meet the Santa Susana Mountains, on the boundary between Los Angeles and Ventura counties between Chatsworth and Simi Valley. Its western Transverse Ranges terrain is dominated by high, narrow ridges and deep canyons. The park includes a 174-acre National Register of Historic Places property with village sites and trading routes of the Fernandeño and Chumash peoples, plus portions of the Old Santa Susana Stage Road.

The park protects a 174-acre National Register property that includes remains of Fernandeño and Chumash trading routes and village sites. Portions of the Old Santa Susana Stage Road, the main mail and passenger route between Los Angeles and the San Francisco Bay Area from 1861 to 1876, lie within the park. The road is Los Angeles Historic-Cultural Monument #92 (1972) and Ventura County Historical Landmark #104 (1986). The park also includes land once part of Spahn Ranch, a movie ranch later linked to Charles Manson.

The park holds remains of trading routes and village sites of the Fernandeño and Chumash peoples, part of a 174-acre National Register property. The Old Santa Susana Stage Road, used for mail and travelers from 1861 to 1876, is a Los Angeles Historic-Cultural Monument and a Ventura County Historical Landmark. Land from the Spahn Ranch, a movie ranch for decades, is also within the park.

The park offers multiple hiking trails connecting different areas and linking to the broader Rim of the Valley trail system between the Santa Monica and San Gabriel Mountains. Trails vary in difficulty and conditions change seasonally, so visitors should plan accordingly.

The park contains land that was once part of Spahn Ranch, a movie ranch used for decades as a filming location for westerns. It later became known for its connection to Charles Manson and the Manson Family.