Aliso and Wood Canyons Regional Park - Aliso Woods has over 30 miles of trails available for most every level of mountain bike rider. Park is located in Aliso Viejo, CA.
Crystal Cove State Park - The park features wooded canyons, open bluffs, and spectacular views. The great expanse upland, north and east of the Pacific Coast Highway is for hikers and mountain bikers, who can follow hillside and canyon trails.
OC Parks main page
O'Neill Regional Park - O'Neill Regional Park is situated in Trabuco and Live Oak Canyons.
Peter's Canyon Regional Park - The park offers a variety of graded roads and trails providing opportunities for hikers, mountain bikers and equestrians.
Santiago Oaks Regional Park - The 1,758-acre Santiago Oaks Regional park offers hikers, bikers, and equestrians a series of interconnecting trails leads through shady groves and to a lookout that features an awe-inspiring view of Orange and the surrounding foothills.
Whiting Ranch Wilderness Park - Whiting Ranch Wilderness Park is located in southeastern Orange County within the foothills of the Cleveland National Forest. The park is bordered by the communities of Foothill Ranch and Portola Hills.