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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
The Auburn Half Marathon 2025
Auburn, California
04 Oct 25
Monster Mash Dash 5K, 10K, and Half Marathon
Santa Monica, California
04 Oct 25
$32.79 - $42.33
Judgment Day Half Marathon & 5K Run/Walk
Bakersfield, California
05 Oct 25
$43.40 - $75.20
Redding Breakfast Lions Turtle Bay Run 2025
Redding, California
05 Oct 25
$22.20 - $64.60
Peace Officer Memorial Run
Modesto, California
05 Oct 25
Free - $96.40
Frightful Finish Line - Halloween Run 5K, 10K, & Half Marathon
Long Beach, California
05 Oct 25
$32.79 - $42.33
Bizz Johnson
Susanville, California
11 Oct 25 - 12 Oct 25
$48.70 - $101.70
Gobble Ghoul and Holly Run 5K, 10K, and Half Marathon
Santa Monica, California
11 Oct 25
$31.73 - $42.33
Night of the Living Runners 5K, 10K, 10 Miler, and Half Marathon
Long Beach, California
11 Oct 25
$26.97 - $41.81
2025 Humboldt Redwoods Marathon, Half Marathon, 5K
Weott, California
12 Oct 25
$43.65 - $107.25
the Wicked Boo Dash 5K, 10K, and Half Marathon
Santa Monica, California
12 Oct 25
$31.73 - $42.33
SPACEROCK Trail Race
Aqua Dulce, California
18 Oct 25
$80.50 - $144.10
Diablo Summit Stomp 2025
Walnut Creek, California
18 Oct 25
Hallo-Thanks-Mas 5K, 10K, and Half Marathon
Santa Monica, California
18 Oct 25
$26.97 - $41.81
MISSION INN RUN
Riverside, California
19 Oct 25
$22.95 - $76.33
The Ghostly Gallup 5K, 10K, 10 Miler, and Half Marathon
Long Beach, California
19 Oct 25
$26.97 - $41.81
The Witches Brew Run 5K, 10K, & Half Marathon
Santa Monica, California
25 Oct 25
$32.79 - $42.33
Malibu Moves: 5K, 10K, Half Marathon & Kids Run
Malibu, California
25 Oct 25 - 27 Oct 25
Free - $120.81
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
San Diego Holiday Half Marathon
San Diego, California
14 Dec 24 - 20 Dec 25
$85.93 - $160.66
Showing 1-21 of 21 results