Santa Susana Pass State Historic Park

Santa Susana Pass State Historic Park is a protected area spanning roughly 670 acres across ridges and canyons where the Simi Hills meet the Santa Susana Mountains. The park sits in northwestern Los Angeles County and contains diverse habitats with varied plant and animal life.

Beginning in 1861, the Santa Susana stagecoach road served as the main mail and passenger route between Los Angeles and San Francisco until it closed in 1876. This passage was critical for connecting the north and south regions of California during that period.

Petroglyphs and stone structures throughout the park reveal how the Fernandeno and Chumash peoples lived on and used this land for generations. Visitors can see these remnants as evidence of how people shaped their relationship with the landscape.

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 rare Santa Susana Tar Plants and natural features including indigenous stone grinding basins and seasonal waterfalls on its grounds. This combination of archaeological remains and natural formations sets the place apart from other nearby parks.