Castle Rock State Park

Castle Rock State Park is a 5,242-acre state park of California, United States, located along the crest of the Santa Cruz Mountains and almost entirely in Santa Cruz County, with parts extending into Santa Clara County and San Mateo County. It embraces coast redwood, Douglas fir, and madrone forest, most of which has been left in its wild, natural state. Steep canyons are sprinkled with unusual rock formations that are a popular rock climbing area.

Source: Wikipedia