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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
Run Against Breast Cancer 5K/10K/13.1 LOS ANGELES
Santa Monica, California
18 Oct 25
$32.80 - $48.70
🚀Boosted
Napa Half Marathon
Napa, California
05 Oct 25
$75.20 - $91.10
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Halloween Havoc – 5K, 10K, and Half Marathon
Fountain Valley, California
26 Oct 25
$26.97 - $41.81
Beer City Halfâ„¢ Bishop Ranch
San Ramon, California
26 Oct 25
Free - $99.05
Trick or Trot 5K, 10K, and Half Marathon
Long Beach, California
26 Oct 25
$32.79 - $42.33
Champion Mine Trail Race
Nevada City, California
12 Oct 25
$38.10 - $64.60
Showing 41-44 of 44 results