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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
Pinkathon 2025 Virtual and In-Person Challenge for Breast Cancer!
Any Place in the World!, California
01 May 25 - 31 Oct 25
Free - $27.50
🚀Boosted
Diablo Summit Stomp 2025
Walnut Creek, California
18 Oct 25
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Pinkathon 2025 Virtual and In-Person Challenge for Breast Cancer!
Any Place in the World!, California
01 May 25 - 31 Oct 25
Free - $27.50
Long Beach, CA Galloway Training Program
Long Beach, California
07 Jun 25 - 04 Oct 25
$100.00 - $120.00
Half-Marathon Training for Fun & Fitness
Grass Valley, California
20 Jul 25 - 05 Oct 25
$36.55
Cheers to Oktoberfest Run 5K/10K/13.1 LOS ANGELES
Los Angeles, California
04 Oct 25
$32.80 - $48.70
Cheers to Oktoberfest Run 5K/10K/13.1 SAN FRANCISCO
San Francisco, California
04 Oct 25
$32.80 - $48.70
The Auburn Half Marathon 2025
Auburn, California
04 Oct 25
Hallo-Thanks-Mas Dash – 5K, 10K, and Half Marathon
San Diego, California
04 Oct 25
$31.21 - $46.05
Cheers to Oktoberfest Run 5K/10K/13.1 SACRAMENTO
Sacramento, California
04 Oct 25
$32.80 - $48.70
Run for Donuts 5K/10K/13.1 SACRAMENTO
Sacramento, California
04 Oct 25
$32.80 - $48.70
Run for Donuts 5K/10K/13.1 SAN FRANCISCO
San Francisco, California
04 Oct 25
$32.80 - $48.70
Run for Donuts 5K/10K/13.1 LOS ANGELES
Los Angeles, California
04 Oct 25
$32.80 - $48.70
Peace Officer Memorial Run
Modesto, California
05 Oct 25
Free - $128.20
Run by the Sea
Santa Cruz, California
05 Oct 25
$54.00 - $75.20
Redding Breakfast Lions Turtle Bay Run 2025
Redding, California
05 Oct 25
$22.20 - $64.60
Judgment Day Half Marathon & 5K Run/Walk
Bakersfield, California
05 Oct 25
$43.40 - $75.20
Napa Half Marathon
Napa, California
05 Oct 25
$75.20 - $91.10
LOOK GOOD FEEL GOOD SAN LEANDRO 5K, 10, HALF MARATHON & MARATHON
San Leandro, California
11 Oct 25
$34.00 - $133.50
Bizz Johnson
Susanville, California
11 Oct 25 - 12 Oct 25
$48.70 - $101.70
Night of the Living Runners – 5K, 10K, 10M, and Half Marathon
Long Beach, California
11 Oct 25
$26.97 - $41.81
Fast Times at Canoga High 5K, 10K & Half
Canoga Park, California
11 Oct 25
$34.99
Gobble Ghoul and Holly Run 5K, 10K, and Half Marathon
Long Beach, California
12 Oct 25
$31.73 - $42.33
Witches Wave - Halloween Run 5K, 10K, and Half Marathon
Huntington Beach, California
12 Oct 25
$42.33 - $52.93
2025 Humboldt Redwoods Marathon, Half Marathon, 5K
Weott, California
12 Oct 25
$54.25 - $128.45
Run Against Breast Cancer 5K/10K/13.1 SAN FRANCISCO
San Francisco, California
18 Oct 25
$32.80 - $48.70
International Sloth Day Run 5K/10K/13.1 SACRAMENTO
Sacramento, California
18 Oct 25
$32.80 - $48.70
International Sloth Day Run 5K/10K/13.1 SAN DIEGO
San Diego, California
18 Oct 25
$32.80 - $48.70
International Sloth Day Run 5K/10K/13.1 SAN FRANCISCO
San Francisco, California
18 Oct 25
$32.80 - $48.70
Diablo Summit Stomp 2025
Walnut Creek, California
18 Oct 25
International Sloth Day Run 5K/10K/13.1 LOS ANGELES
Santa Monica, California
18 Oct 25
$32.80 - $48.70
Back to the Future: 88 MPH Dash 5K, 10K & Half
Canoga Park, California
18 Oct 25
$34.99
Run Against Breast Cancer 5K/10K/13.1 LOS ANGELES
Santa Monica, California
18 Oct 25
$32.80 - $48.70
Run Against Breast Cancer 5K/10K/13.1 SACRAMENTO
Sacramento, California
18 Oct 25
$32.80 - $48.70
Run Against Breast Cancer 5K/10K/13.1 SAN DIEGO
San Diego, California
18 Oct 25
$32.80 - $48.70
Frightful Finish Line - Halloween Run 5K, 10K, & Half Marathon
Long Beach, California
19 Oct 25
$32.79 - $42.33
DIA DE LOS MUERTOS HALF MARATHON & 5K RUN/WALK (BAKERSFIELD)
Bakersfield, California
19 Oct 25
$28.56 - $79.44
Heart of Cool Trail Run
Cool, California
19 Oct 25
$32.80 - $59.30
The Ghostly Gallup – 5K, 10K, 10 Miler, and Half Marathon
Long Beach, California
19 Oct 25
$26.97 - $41.81
Fleet Feet Fall Classic - Trail October 19th, 2025
Chico, California
19 Oct 25
$85.80
MISSION INN RUN
Riverside, California
19 Oct 25
$22.95 - $87.00
Malibu Moves: Half Marathon, 10K, 5K, 1-Mi & 1K
Malibu, California
25 Oct 25 - 27 Oct 25
Free - $198.20
Showing 1-40 of 43 results
