May Ultra Trail Runs in California
City Location
1. Folsom Lake Trail Run
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May 3, 2025Saturday
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50K, 35K, 13.1M, 10K trail run
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Folsom, CA
Sacramento County, CA
2. Hacienda Hills Run
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May 3, 2025Saturday
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50K, 26.2M, 13.1M, 9M, 10K, 5K trail run
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San Jose, CA
Santa Clara County, CA
3. Hollywood to the Sea Road & Trail Relay
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May 3, 2025Saturday
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75M trail run | 75M relay
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Los Angeles, CA
Los Angeles County, CA
4. Miwok 100K
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May 3, 2025Saturday
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100K trail run
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Stinson Beach, CA
Marin County, CA
5. Grizzly Peak Trail Run
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May 10, 2025Saturday
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50K, 26.2M, 30K, 13.1M, 10K trail run | kids run
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Berkeley, CA
Alameda County, CA
6. John Wayne Grit Series - Newport Coast
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May 10, 2025Saturday
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50K, 25K, 5K trail run
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Laguna Beach, CA
Orange County, CA
7. Pacific Crest Trail 50 (PCT 50)
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May 10, 2025Saturday
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50M trail run
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San Diego, CA
San Diego County, CA
8. Quicksilver Endurance Runs
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May 10, 2025Saturday
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100K, 50K trail run
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San Jose, CA
Santa Clara County, CA
9. Paiute Meadows Trail Run
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Past DateMay 11, 2024Saturday
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50K, 13.6M, 4.5M trail run | 50K relay
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Susanville, CA
Lassen County, CA
10. Trail Run at Sly Park
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Past DateMay 11, 2024Saturday
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50K, 26.2M, 18M, 13.1M, 8.5M, 10K, 5K trail run
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Pollock Pines, CA
El Dorado County, CA
11. Born To Run Ultra Marathons
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May 14, 2025Wednesday
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96H trail run
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Los Olivos, CA
Santa Barbara County, CA
12. Born To Run Ultra Marathons
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May 15, 2025Thursday
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72H trail run
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Los Olivos, CA
Santa Barbara County, CA
13. Born To Run Ultra Marathons
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May 16, 2025Friday
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48H, 100M trail run
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Los Olivos, CA
Santa Barbara County, CA
14. Bishop High Sierra Ultras
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May 17, 2025Saturday
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100K, 50M, 53K, 20M, 6K trail run
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Bishop, CA
Inyo County, CA
15. Born To Run Ultra Marathons
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May 17, 2025Saturday
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30M, 20M, 10M trail run
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Los Olivos, CA
Santa Barbara County, CA
16. Corral Canyon Trail Scramble
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Past DateMay 18, 2024Saturday
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50K, 14M, 9M, 5M trail run
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Campo, CA
San Diego County, CA
17. Pasadena Running Company 50K Relay
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Past DateMay 26, 2024Sunday
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50K, 10K trail run | 50K relay
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Pasadena, CA
Los Angeles County, CA
18. Calero Trail Run
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May 31, 2025Saturday
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50K, 26.2M, 25K, 13.1M, 15K, 10K, 5K trail run
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San Jose, CA
Santa Clara County, CA
For the love of all that Is good And moisture wicking...
Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.
ALWAYS visit the race's website for the most complete and accurate race information.
ALWAYS visit the race's website for the most complete and accurate race information.