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.

Race information

50 km
50k
Marathon
Marathon
30 km
30k
Half Marathon
Half-Marathon
10 km
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Join OC Trail Runners for a free social trail run at El Moro and Laguna Coast Wilderness Park in Newport Beach, led by an Aravaipa rep. About 7.5 miles with rocky sections, so bring hydration and stay after for snacks and a raffle.

Explore oak and chaparral trails in the Santa Ana foothills at the Whiting Ranch Trail Races. Choose 6k, 10k, half marathon or 30k, enjoy marked, supported courses, event swag, and a post race beer from Docent Brewing.

Challenge yourself at the Billy Goat Mountain Climb on April 4, 2026 in Cleveland National Forest near Silverado CA. Choose the 17 Miler Silverado Loop, Half Marathon or 10K and tackle rugged trails with big climbs and creekside scenery.

Hit the trails at Crystal Cove for Rock It in El Moro Canyon on April 4, 2026, choose a scenic 6K or challenging 10 Miler with climbs, descents and Pacific Ocean views. Run or hike, and enjoy a shirt, race photos and a finisher medal.