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Half Marathons found in California in October
View all ↓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
🚀Boosted
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