O'Neill Park Trail Races

About the Event

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 Timing

The 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

Course and Environment

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.

- Terrain: The trails are a classic Southern California mix, ranging from fast, groomed fire roads to technical single-track with moderate elevation gain and loss.
- Climate: Given the mid-May date, runners should be prepared for variable conditions, ranging from cool morning marine layers to dry, warm afternoon sun.
- Support: As a KHraces production, runners can expect fully stocked aid stations and clearly marked routes to ensure a safe and professional racing environment.

Logistics and Policies

Participants should take note of the strict operational policies in place for this event to ensure smooth race management.

- Registration: Online registration through UltraSignup remains open until Friday, May 1, 2026, at 11:59 PM PT.
- Refund Policy: The event maintains a strict "no refunds" policy. However, in the case of emergency cancellations (such as extreme weather or fire), entries can be rolled over to a rescheduled date or a different event in the KHraces series.
- Location: 30892 Trabuco Canyon Road, Trabuco Canyon, CA. Parking and staging instructions are provided on the official race website.

Historical Performance

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.

Races Offered

10k

May 16, 2026

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Distance — 10K

terrain

Type — Running

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07:30

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$95.00

30k

May 16, 2026

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Distance — 30K

terrain

Type — Running

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07:30

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$125.00

50k

May 16, 2026

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Distance — 50K

terrain

Type — Running

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07:30

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$155.00

Half Marathon

May 16, 2026

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Distance — 21.1K

terrain

Type — Running

timer

07:30

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$115.00

Marathon

May 16, 2026

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Distance — 42.2K

terrain

Type — Running

timer

07:30

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$140.00

Weather Overview

These values represent the 3-year monthly averages for May in Trabuco Canyon.

Temp (°C)

Feels Like (°C)

thermostat 12.4° / 22.6°

wb_sunny 11.9° / 21.0°

Wind (km/h)

Humidity (%)

air 6.8 /

water_drop 75.4%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 12.4° / 22.6°

wb_sunny 11.9° / 21.0°

air 6.8 km/h

water_drop 75.4%

About 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.