September Half Marathons within 300 miles of Auburn, CA on Weekends
City Location
1. Crystal Springs
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Past DateSep 1, 2024Sunday
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50K, 26.2M, 35K, 13.1M, 8K trail run | kids run
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Woodside, CA
119 miles point to pointSan Mateo County, CA
2. Diablo Trail Run
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Sep 7, 2025Sunday
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50K, 26.2M, 13.1M, 10M, 4M trail run | kids run
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Clayton, CA
80 miles point to pointContra Costa County, CA
3. Groves Trail Run
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Past DateSep 7, 2024Saturday
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50K, 30K, 13.1M trail run
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Loma Mar, CA
130 miles point to pointSan Mateo County, CA
4. Mendocino Running Festival
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Past DateSep 7, 2024Saturday
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12H, 6H, 13.1M, 10K trail run | 6H relay
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Mendocino, CA
147 miles point to pointMendocino County, CA
5. Mt. Madonna Challenge
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Past DateSep 7, 2024Saturday
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13.1M, 10K, 5K run | 13.1M, 10K, 5K trail run
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Gilroy, CA
133 miles point to pointSanta Clara County, CA
6. Delta Harvest Run
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Past DateSep 8, 2024Sunday
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13.1M, 10K, 5K, 1M run
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Brentwood, CA
74 miles point to pointContra Costa County, CA
7. Berkeley Trail Adventure
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Past DateSep 14, 2024Saturday
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50K, 35K, 13.1M, 10K trail run
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Berkeley, CA
95 miles point to pointAlameda County, CA
8. South Hills Single Track Trail Run
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Past DateSep 14, 2024Saturday
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50K, 26.2M, 16M, 13.1M, 9M, 10K, 5K trail run
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San Jose, CA
112 miles point to pointSanta Clara County, CA
9. Rocky Ridge Trail Half Marathon
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Sep 20, 2025Saturday
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13.1M, 10K, 5K trail run
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San Ramon, CA
91 miles point to pointContra Costa County, CA
10. Moore Mountain Trail Run
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Past DateSep 21, 2024Saturday
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30K, 13.1M, 5K trail run
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Klamath Falls, OR
233 miles point to pointKlamath County, OR
11. Clo Cow Half Marathon
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Past DateSep 22, 2024Sunday
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13.1M, 10K, 5K run
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Petaluma, CA
94 miles point to pointSonoma County, CA
12. Honey Badger Half
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Past DateSep 22, 2024Sunday
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13.1M, 10K, 5K run
Virtual OptionMore Information
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San Rafael, CA
100 miles point to pointMarin County, CA
13. Pacifica Summit Run
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Sep 27, 2025Saturday
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30K, 13.1M, 10K trail run
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Pacifica, CA
116 miles point to pointSan Mateo County, CA
14. Sunset & Cider Trail Races
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Sep 27, 2025Saturday
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50K, 13.1M, 5M trail run
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Auburn, CA
Placer County, CA
15. Arnold Rim Trail Endurance Runs
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Past DateSep 28, 2024Saturday
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37M, 22M, 13.1M, 10K trail run
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Arnold, CA
58 miles point to pointCalaveras County, CA
16. Big Sur Trail Marathon
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Past DateSep 28, 2024Saturday
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26.2M, 13.1M, 5M trail run
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Big Sur, CA
185 miles point to pointMonterey County, CA
17. Celebration of Life - Trail Trek
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Past DateSep 29, 2024Sunday
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13.1M, 5K trail run
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Willits, CA
126 miles point to pointMendocino 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.