O'Neill Regional Park 30892 Trabuco Canyon Road Trabuco Canyon, CA 92678 (949) 923-2260 or (949) 923-2256 oneillpark@ocparks.com
Day Use: Open year round 7 a.m. to sunset. Trails: Closed for three days following rain. Camping: Year round, check-out at 12 p.m., check-in at 2 p.m., camping registration is from 7 a.m. to 8 p.m.
Parking fees (day use): $3 per vehicle entry Monday - Friday; $5 Saturday - Sunday; Higher for some holidays and events (Fee Information)
O'Neill Regional Park's 4,500 acres are situated in beautiful Trabuco and Live Oak Canyons. The park is heavily wooded with coast live oak and sycamore trees. The hillsides surrounding the park are filled with cactus, wild buckwheat, sagebrush and chaparral of scrub oak, buckthorn and mountain mahogany. Trabuco and Hickey Creeks also meander through the park, flowing in winter and early spring, dry in summer and fall.
The park serves both as an overnight camping and day use/picnic facility.
Picnic areas vary in size and are available on a first come, first served basis or by reservation. Barbeques and picnic tables are available throughout the park. Call the park for more information.
More than 23 miles of scenic trails can be explored by foot, bicycle or horseback. Other day use activities include horseshoe pits, two large community turf areas and a children’s playground.
The Arroyo campground offers 79 campsites varying in size to accommodate RVs or tent camping for up to eight people per site. Reservations for individual sites can be made online, by phone or in person. The park offers eight large group campsites for parties of 17 or more and five equestrian campsites, each equipped with horse corrals, barbeques and fire pits. Reservations for groups of 17 or more can be made by calling the park office at (949) 923-2260.
UPDATED 7/02/20: In an effort to minimize the impacts of coronavirus (COVID-19) on park patrons, staff, and the Orange County community at large, and consistent with the guidance provided by the Centers for Disease Control and Prevention (CDC), Governor’s office, the Orange County Board of Supervisors and the Orange County Health Care Agency (HCA), OC Parks are operating in the following manner.
Upcoming trail work will reopen and realign some trails in southern portions of O’Neill Regional Park, including Water Works, Ladera and Chiquita Ridge trails
Please be advised that the campground will be evacuated and the park closed if predicted or actual rainfall exceeds safe thresholds and conditions exist that pose imminent threat to life and property.
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The park serves both as an overnight camping and day use/picnic facility. 
