Deep in the eastern Santa Monica Mountains, 1,500-acre Westridge-Canyonback Park is bordered by upper Mandeville Canyon, Sullivan Canyon, Mission Canyon, and San Vicente Mountain Park.  The Mandeville Fire Road provides miles of trail access for hikers, mountain bikers, and equestrians along the north-south ridgeline. The park is accessible from both San Vicente Mountain Park in the San Fernando Valley and at the end of Westridge Drive at the Westridge Trailhead in West Los Angeles.