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Half Marathons found in California in September

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Half Marathons in California in September 2025

Find A Race is the US's favourite event listings site. Check out our list of September 2025 Half Marathons in California below.

Race Calendar: Half Marathons found in September

Diablo Trail Run

Clayton, California
07 Sep 25
Free - $85.80

Teaching & Learning Collaborative Charity Group Registration (2025 Disneyland Halloween Half Marathon Weekend )

Anaheim, California
05 Sep 25 - 07 Sep 25
$34.29 - $473.50
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