October Ultras in California
Big Bear Lake, CA
Kodiak Ultra Marathons
Oct 10, 2025
Oct 11, 2025
Agoura Hills, CA
No Name 5030 Trail Races
Oct 19, 2024
San Jose, CA
Mt. Umunhum Trail Conquest
Oct 12, 2024
South Lake Tahoe, CA
Lake Tahoe Marathon Weekend
Oct 19, 2025
Oct 17, 2025
Oct 18, 2025
San Francisco, CA
Ruth Anderson Memorial Endurance Run
Oct 12, 2024
Pinkathon Challenge for Breast Cancer
Oct 19, 2024
Lone Pine, CA
Wild Wild West Marathon
Oct 5, 2024
Pollock Pines, CA
Trail Run at Sly Park
Oct 26, 2024
San Diego, CA
Lake Hodges Trail Festival
Oct 19, 2024
Rocklin, CA
Mile Madness Endurance Run
Oct 10, 2025
Susanville, CA
Bizz Johnson
Oct 12, 2025
Oct 11, 2025
Hemet, CA
Boundiful Endurance Runs
Oct 5, 2024
Los Olivos, CA
Back on the Ranch
Oct 5, 2024
Nevada City, CA
Yuba Gold Trail Runs
Oct 5, 2024
Warner Springs, CA
Ragnar Trail So Cal
Oct 25, 2024
Los Osos, CA
Spooner's Cove
Oct 6, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Back on the Ranch
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Past DateOct 5, 2024Saturday
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24H, 12H, 6H run
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Los Olivos, CA
Santa Barbara County, CA
2. Boundiful Endurance Runs
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Past DateOct 5, 2024Saturday
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24H, 12H, 6H, 3H run | 24H, 12H, 6H relay | kids run
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Hemet, CA
Riverside County, CA
3. Wild Wild West Marathon
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Past DateOct 5, 2024Saturday
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50M, 50K, 26.2M, 10M trail run
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Lone Pine, CA
Inyo County, CA
4. Yuba Gold Trail Runs
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Past DateOct 5, 2024Saturday
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50K, 32K trail run
More Information
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Nevada City, CA
Nevada County, CA
5. Spooner's Cove
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Past DateOct 6, 2024Sunday
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50K, 37K, 25K, 13K, 8K trail run | kids run
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Los Osos, CA
San Luis Obispo County, CA
6. Kodiak Ultra Marathons
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Oct 10, 2025Friday
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100M trail run
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Big Bear Lake, CA
San Bernardino County, CA
7. Mile Madness Endurance Run
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Oct 10, 2025Friday
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72H, 48H, 24H, 100M, 12H, 6H trail run | kids run
More Information
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Rocklin, CA
Placer County, CA
8. Bizz Johnson
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Oct 11, 2025Saturday
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50K, 26.2M, 13.1M, 10K trail run
More Information
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Boston Marathon Qualifier
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Susanville, CA
Lassen County, CA
9. Kodiak Ultra Marathons
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Oct 11, 2025Saturday
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100K, 50K, 21K trail run
More Information
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Big Bear Lake, CA
San Bernardino County, CA
10. Mt. Umunhum Trail Conquest
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Past DateOct 12, 2024Saturday
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50K, 26.2M, 13.1M, 5K trail run
More Information
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San Jose, CA
Santa Clara County, CA
11. Ruth Anderson Memorial Endurance Run
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Past DateOct 12, 2024Saturday
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50M, 50K run
More Information
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San Francisco, CA
San Francisco County, CA
12. Lake Tahoe Marathon Weekend
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Oct 18, 2025Saturday
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72M, 52.4M, 26.2M, 13.1M run | 72M relay
More Information
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Boston Marathon Qualifier
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South Lake Tahoe, CA
El Dorado County, CA
13. Lake Hodges Trail Festival
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Past DateOct 19, 2024Saturday
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50K, 15K, 10K, 5K trail run | kids run
More Information
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San Diego, CA
San Diego County, CA
14. Lake Tahoe Marathon Weekend
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Oct 19, 2025Sunday
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72M, 26.2M, 16.4M, 13.1M, 10K, 5K run | 26.2M relay | kids run
More Information
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Boston Marathon Qualifier
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South Lake Tahoe, CA
El Dorado County, CA
15. No Name 5030 Trail Races
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Past DateOct 19, 2024Saturday
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50K, 25K trail run
More Information
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Agoura Hills, CA
Los Angeles County, CA
16. Pinkathon Challenge for Breast Cancer
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Past DateOct 19, 2024Saturday
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50K, 26.2M, 13.1M, 10M, 10K, 5K run
More Information
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San Francisco, CA
San Francisco County, CA
17. Ragnar Trail So Cal
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Oct 25, 2024Friday
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120M relay
More Information
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Warner Springs, CA
San Diego County, CA
18. Trail Run at Sly Park
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Oct 26, 2024Saturday
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50K, 26.2M, 18M, 13.1M, 8.5M, 10K, 5K trail run
More Information
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Pollock Pines, CA
El Dorado 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.