O'Neill Park Trail Races
Rancho Santa Margarita, United States • 16 May 2026
Event details
O'Neill Park Trail Races is scheduled for Saturday, May 16, 2026, at O'Neill Regional Park in Trabuco Canyon, California (30892 Trabuco Canyon Rd). The event offers multiple distance options:
- 50k
- Marathon
- 30k
- Half Marathon
- 10k
Registration opens October 1, 2025, and closes May 1, 2026. The event policy states there are no refunds; if the race is canceled for weather or a fire, entries may be rolled over to the make-up date or another KHraces event.
Logistics and course
Parking at O'Neill Park carries a $5 fee. Optional bib pickup and parking pass distribution are available at Fleet Feet Laguna Niguel on Friday, May 16, from 3:30 PM to 6:30 PM, or at the race start on race morning. The course runs through parts of the park's 4,500 acres in Trabuco and Live Oak Canyons and passes through areas with coast live oak and sycamore trees, cactus, wild buckwheat, sagebrush, scrub oak, buckthorn, and mountain mahogany. Past race results and photos are available for prior years (2023–2025). Visit the organization's website for the most recent information.