This area includes 410 acres of open space distributed throughout the Sunset Hills community in northern Thousand Oaks. The largest of these areas is a key component of the "ring" of open space, located on Erbes Road, east of the Thousand Oaks (23) Freeway and south of Olsen Road. This 238-acre area protects oak woodlands, coastal sage scrub, non-native grasslands and coastal sage scrub. It also contains areas of steeply sloping land and a prominent ridgeline. Trails in this area provide views of Bard Reservoir, and on clear days the Pacific Ocean can be seen. This area supports many species of wildlife, including birds of prey such as black-shouldered kites, northern harriers and red-tailed hawks. Spring blooms of bladderpod attract many hummingbirds to this area. Access is provided from a trailhead on Erbes Road. COSCA owns the majority of the Sunset Hills Open Space.