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Half Marathons found in California in September

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Half Marathons in California in September 2025

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

Race Calendar: Half Marathons found in September

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Teaching & Learning Collaborative Charity Group Registration (2025 Disneyland® Halloween Half Marathon Weekend )

Anaheim, California
05 Sep 25 - 07 Sep 25
$34.29 - $1,893.80
🚀Boosted

Jurassic Jaunt – 5K, 10K, 10M, and Half Marathon

Long Beach, California
21 Sep 25
$26.97 - $41.81
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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

Half-Marathon Training for Fun & Fitness

Grass Valley, California
20 Jul 25 - 05 Oct 25
$36.55

Teaching & Learning Collaborative Charity Group Registration (2025 Disneyland® Halloween Half Marathon Weekend )

Anaheim, California
05 Sep 25 - 07 Sep 25
$34.29 - $1,893.80

Disneyland® Halloween Half Marathon Weekend 2025

Anaheim, California
05 Sep 25 - 11 Sep 25
$138.80 - $284.50

Diablo Trail Run

Clayton, California
07 Sep 25
Free - $85.80

Mammoth Bar Trail Runs

Auburn, California
07 Sep 25
$52.94 - $84.74

National Chocolate Day: Run for Chocolates SAN DIEGO

San Diego, California
13 Sep 25
$32.80 - $48.70

Hedgehog Dash 5K/10K/13.1 LOS ANGELES

Los Angeles, California
13 Sep 25
$32.80 - $48.70

Hedgehog Dash 5K/10K/13.1 SAN DIEGO

San Diego, California
13 Sep 25
$32.80 - $48.70

National Chocolate Day: Run for Chocolates SACRAMENTO

Sacramento, California
13 Sep 25
$32.80 - $48.70

Earth and Sky Fall Equinox Run 5K, 10k, & Half Marathon

Santa Monica, California
13 Sep 25
$32.79 - $42.33

National Chocolate Day: Run for Chocolates SAN FRANCISCO

San Francisco, California
13 Sep 25
$32.80 - $48.70

National Chocolate Day: Run for Chocolates LOS ANGELES

Los Angeles, California
13 Sep 25
$32.80 - $48.70

Hedgehog Dash 5K/10K/13.1 SACRAMENTO

Sacramento, California
13 Sep 25
$32.80 - $48.70

Totally 90's - Smells like Run Spirit 5K, 10K, Half Marathon

Long Beach, California
13 Sep 25
$35.97 - $128.19

Hedgehog Dash 5K/10K/13.1 SAN FRANCISCO

San Francisco, California
13 Sep 25
$32.80 - $48.70

Totally 80's Fast Times in Huntington Beach 5K, 10K, & Half Marathon

Huntington Beach, California
14 Sep 25
$11.60 - $52.93

Pirates Plunder – 5K, 10K, 10-miler, and Half Marathon

Long Beach, California
14 Sep 25
$26.97 - $41.81

Oh my Gourd - Falling for Miles 5K, 10K, & Half Marathon

Long Beach, California
14 Sep 25
$32.79 - $42.33

The Great American Pizza Run

Long Beach, California
20 Sep 25
$11.60 - $46.57

Harvest Moon Trot – 5K, 10k, and Half Marathon

Santa Monica, California
20 Sep 25

Rocky Ridge 2025

San Ramon, California
20 Sep 25

Booty Dash: A Race for the Gold - Pirate Run 5K, 10K, & Half Marathon

Long Beach, California
20 Sep 25
$32.79 - $42.33

Bayside Saved by the Bell 5K, 10K & Half Marathon

Canoga Park, California
20 Sep 25
$34.99

Jurassic Jaunt – 5K, 10K, 10M, and Half Marathon

Long Beach, California
21 Sep 25
$26.97 - $41.81

Run with the Pack - Harvest Moon Run 5K, 10K

Santa Monica, California
21 Sep 25
$32.79 - $42.33

Alameda Island Running Festival

Alameda, California
21 Sep 25
$48.70 - $107.00

National Singles Day: Singles & Friends Running Club LOS ANGELES

Los Angeles, California
27 Sep 25
$32.80 - $48.70

National Singles Day: Singles & Friends Running Club SACRAMENTO

Sacramento, California
27 Sep 25
$32.80 - $48.70

National Coffee Day: Run for Coffee SACRAMENTO

Sacramento, California
27 Sep 25
$32.80 - $48.70

National Coffee Day: Run for Coffee SAN DIEGO

San Diego, California
27 Sep 25
$32.80 - $48.70

National Singles Day: Singles & Friends Running Club SAN DIEGO

San Diego, California
27 Sep 25
$32.80 - $48.70

National Coffee Day: Run for Coffee LOS ANGELES

Los Angeles, California
27 Sep 25
$32.80 - $48.70
Showing 1-33 of 33 results