O'Neill Park Trail Races
Rancho Santa Margarita, United States • 16 May 2026
O'Neill Park Trail Races, Trabuco Canyon CA
O'Neill Park Trail Races take place at O'Neill Regional Park in Trabuco Canyon, California, on Saturday, May 16, 2026. The event uses trails across the park's 4,500 acres and runs through Trabuco and Live Oak Canyons among coast live oak and sycamore trees. Runners will pass hillsides populated with cactus, wild buckwheat, sagebrush, scrub oak, buckthorn, and mountain mahogany.
Distances offered include:
- 50k
- Marathon
- 30k
- Half Marathon
- 10k
Parking at the park carries a $5 fee. There is an optional bib pickup at Fleet Feet Laguna Niguel the afternoon before the race and bib pickup is also available at the race start on race morning; the Fleet Feet pickup can include the parking pass purchase. An athlete guide and past race results are provided by the organizer. Volunteer opportunities are listed by the organizer.
Registration is scheduled to open on October 1, 2025 and to close on May 1, 2026. The event policy states there are no refunds under any circumstances; if the event is cancelled due to weather or a fire the organizer will allow a full rollover to the makeup date or to another KHraces event. Visit the organization's website for the most recent information.