California · 10K · Half Marathon · 35K
Caspers Trail Races
Caspers Trail Races is a 10K, half marathon, 35K, marathon and 50K event held in San Juan Capistrano, California. Its next confirmed date is Saturday, October 31, 2026. About 49 runners take part across all distances.
- Race day
- October 31, 2026
- Location
- San Juan Capistrano, CA
- Field size
- ~49 runners
Race details
- Date
- Saturday, October 31, 2026
- Location
- San Juan Capistrano, California
- Distances
- 10K, Half Marathon, 35K, Marathon, 50K
- Field size
- About 49 runners
- Course
- Rolling-to-hilly Orange County singletrack and fire road, roughly 800 ft gain for the 10K up to about 4,950 ft gain for the 50K (official course data)
- Registration
- ultrasignup.com
- Official website
- khraces.com
Registration, course & weather
- Registration status
- Registration status as last checked September 26, 2026: open
- Start time
- 7:30 AM PDT
- Course profile — 10K
- Out-and-back course; Trail surface; 803 ft gain (official course data)
- Course profile — Half Marathon
- Out-and-back course; Trail surface; 2250 ft gain (official course data)
- Course profile — 35K
- Out-and-back course; Trail surface; 3753 ft gain (official course data)
- Course profile — Marathon
- Out-and-back course; Trail surface; 4606 ft gain (official course data)
- Course profile — 50K
- Out-and-back course; Trail surface; 4947 ft gain (official course data)
About the Caspers Trail Races
Caspers Trail Races run through the 8,000-acre Ronald W. Caspers Wilderness Park near San Juan Capistrano, CA, offering five well-marked trail distances from 10K to 50K across oak-lined canyons and sage-covered hillsides.
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Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
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- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Caspers Trail Races: common questions
- When is the Caspers Trail Races?
- The next confirmed date is Saturday, October 31, 2026.
- Where is the Caspers Trail Races held?
- In San Juan Capistrano, California.
- What distances does the Caspers Trail Races offer?
- 10K, Half Marathon, 35K, Marathon and 50K.
- How many people run the Caspers Trail Races?
- About 49 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Caspers Trail Races?
- Registration is handled by the organiser at ultrasignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Caspers Trail Races?
- Registration status as last checked September 26, 2026: open. Listed fee for the longest distance, $155 (from khraces.com, checked September 26, 2026).
- What time does the Caspers Trail Races start?
- 7:30 AM PDT.
Plan this race in RaceRove
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