O'Neill Regional Park
Near Rancho Santa Margarita, Orange County, CA
About O'Neill Regional Park
4,500 acres in Trabuco and Live Oak Canyons, wooded with coast live oak and sycamore. Source
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.
Know before you go
O'Neill Regional Park covers 3,596 acres near Rancho Santa Margarita in Orange County. Closing follows the sun here: sunset at O'Neill Regional Park is around 4:43 p.m. in mid-December, 6:57 p.m. in mid-March, 8:01 p.m. in mid-June, and 6:58 p.m. in mid-September. 12 named trails add up to about 27.2 miles inside the park; the longest is Arroyo Trabuco Trail at 9 miles, and Live Oak Trail has the most up and down (about 1,148 feet). Mapped trails range from 874 to 1,487 feet in elevation. OpenStreetMap shows 15 parking areas, plus 9 restrooms and 1 drinking fountain. The closest mapped bus stop is Santa Margarita-Avd De Las Flores, about 990 feet from the park.
Facilities
- Camping
- Drinking Water
- Historic Site
- Picnic Area
- Playground
- Restrooms
- Tennis Courts
Facility details: OpenStreetMap
O'Neill Regional Park at a glance
- PParking · 15
- WCRestrooms · 9
- WDrinking water · 1
- Named trails · 7
© OpenStreetMap · CPAD · About this map
Trails
| Trail | Mapped length | Elevation | Surface & uses |
|---|---|---|---|
| Arroyo Trabuco Trail | 9 mi | 30 ft up & down874–909 ft | UnpavedBikesHorsesNo dogs |
| Live Oak Trail | 3 mi | 1,148 ft up & down892–1,487 ft | UnpavedBikesHorsesNo dogsPaved |
| Tijeras Creek Trail | 2.9 mi | ||
| West Bank Arroyo Trabuco Trail | 2.2 mi | ||
| Hoffman Homestead Trail | 1.8 mi | 388 ft up & down994–1,137 ft | UnpavedBikesHorsesNo bikesNo dogs |
| Trabuco Creek Trail Bike Path | 1.6 mi | 102 ft up & down959–1,116 ft | PavedBikes |
| Mesa Trail | 1.3 mi | 190 ft up & down990–1,123 ft | UnpavedBikesHorses |
| Trabuco Creek Bike Path | 1.3 mi | ||
| Pawfoot Trail | 1.1 mi | 122 ft up & down921–1,002 ft | UnpavedNo bikesHorsesNo dogsPaved |
| Machete Trail | 1.1 mi | ||
| Coyote Canyon Trail | 1 mi | 403 ft up & down942–1,321 ft | UnpavedBikesHorses |
| Loop Trail | 0.9 mi |
Getting to O'Neill Regional Park by bus
- Santa Margarita-Avd De Las Flores · 990 ft from the park
Stops within a quarter mile of O'Neill Regional Park; confirm times with the transit agency.
Compared with nearby parks
Among the 3 other parks in this guide within 10 miles, O'Neill Regional Park is number 2 of 4 by size at 3,596 acres. 1 nearby park has more mapped trail mileage than its 27.2 miles.
Closest places for what O'Neill Regional Park doesn't list:
- Pickleball Courts: Laguna Niguel Regional Park (9.8 mi)
Rules & reservations
Official park page- Dogs
O'Neill Regional Park's official page does not mention dogs; confirm with OC Parks. Source
Day use, year-round.
Map & directions
Nearby parks
Straight-line distanceContinue exploring
Orange County parks Playgrounds Tennis CourtsSources & verification
Last verified: Oct 16, 2026- California Protected Areas Database (CPAD) 2026aname, county, agency, access, acres
- OC Parks park pageofficial_url, hours, hours_note, fees, description
- OpenStreetMap facilities and trailsfacilities.camping, facilities.drinking-water, facilities.historic-site, facilities.picnic-area, facilities.playground, facilities.restrooms, facilities.tennis-court, trails
- U.S. Census Bureau place boundaries (nearest place)city
- Official park page (checked for dog and fee information)unstated.dogs
- OpenStreetMap: parking, restrooms, water, trailheads, trail lines, and bus stopsvisit
- Terrain Tiles elevation (USGS 3DEP), sampled every 20 m along OpenStreetMap trail linestrails.elevation
- Official park page (introduction excerpt)intro