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Half Marathons found in California in October

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Half Marathons in California in October 2025

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

Race Calendar: Half Marathons found in October

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Diablo Summit Stomp 2025

Walnut Creek, California
18 Oct 25
🚀Boosted

Hallo-Thanks-Mas Dash – 5K, 10K, and Half Marathon

San Diego, California
04 Oct 25
$31.21 - $46.05
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Malibu Moves: Half Marathon, 10K, 5K, 1-Mi & 1K

Malibu, California
25 Oct 25 - 27 Oct 25
Free - $198.20

Beer City Halfâ„¢ Bishop Ranch

San Ramon, California
26 Oct 25
Free - $101.70

Trick or Trot 5K, 10K, and Half Marathon

Long Beach, California
26 Oct 25
$32.79 - $42.33

Halloween Havoc – 5K, 10K, and Half Marathon

Fountain Valley, California
26 Oct 25
$26.97 - $41.81
Showing 41-44 of 44 results
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