The O'Neill Park Trail Races showcase the scenic landscape of the Trabuco Canyon region in South Orange County, California. Scheduled for Saturday, May 16, 2026, the event is part of the Keira Henninger (KH) Races series. Known for its well-organized atmosphere and diverse trail systems, the race provides a range of distances that appeal to both seasoned ultra-runners and those looking for shorter trail experiences.
Race Categories and TimingThe event offers five distinct distances, allowing participants to choose a challenge that fits their endurance level. All races begin on Saturday morning at the main trailhead area.
| Category | Start Time | Location |
|---|---|---|
| 50k Ultra | 7:30 AM | O'Neill Regional Park |
| Trail Marathon | 7:30 AM | O'Neill Regional Park |
| 30k Trail | 7:30 AM | O'Neill Regional Park |
| Half Marathon | 7:30 AM | O'Neill Regional Park |
| 10k Trail | 7:30 AM | O'Neill Regional Park |
O'Neill Regional Park is celebrated for its spectacular beauty, featuring a mix of live oak and sycamore groves and hillsides of cactus and wild buckwheat.
Participants should take note of the strict operational policies in place for this event to ensure smooth race management.
The 50k distance has seen strong competition over the last few years. The current modern benchmark for the course was set by Jesse Haynes in 2023 with a time of 4:05:28. Recent performances in 2025 by Benjamin Atkins (4:07:33) and Spencer Matthews (4:22:47) indicate that the course remains a fast but challenging test for regional trail athletes.
May 16, 2026
Distance — 10K
Type — Running
07:30
$95.00
May 16, 2026
Distance — 30K
Type — Running
07:30
$125.00
May 16, 2026
Distance — 50K
Type — Running
07:30
$155.00
May 16, 2026
Distance — 21.1K
Type — Running
07:30
$115.00
May 16, 2026
Distance — 42.2K
Type — Running
07:30
$140.00
These values represent the 3-year monthly averages for May in Trabuco Canyon.
Learn more about the host city, Trabuco Canyon.
Trabuco Canyon is a small unincorporated community and census-designated place (CDP) located in the foothills of the Santa Ana Mountains in eastern Orange County, California, and lies partly within the Cleveland National Forest.
Read more launchWatch highlights and course previews from previous years.
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