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California Half Marathons in August

This is the calendar of all the California half marathons in August. On these race calendars, not only will you be able to search the basics of cities and dates, but you’ll also be able to find August California half marathons by difficulty, scenery, race size, and attributes like whether it’s pet-friendly, stroller-friendly, or has a great finisher party.

If you can’t find the half marathon you’re looking for in California in August, it’s possible the race has not updated their date to the current year or has switched months. If you know a race belongs on this calendar or have any edits you’d like to suggest for an existing race in California in August, you can email us [email protected].

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Truckee Half Marathon & 5K logo
August 2, 2025
100-500 runners
Truckee, California
Hell Of A Half Marathon & 2 Person Relay
August 2, 2025
100-500 runners
Exeter, California
Rodeo Valley Trail Run
August 2, 2025
100-500 runners
Sausalito, California
Troy’s California Trail Runs logo
August 2, 2025
1-100 runners
Kit Carson, California
August 2, 2025
100-500 runners
San Leandro, California
Monsters of the Deep- 5K, 10K, and Half Marathon logo
August 2, 2025
1-100 runners
Santa Monica, California
August 3, 2025
100-500 runners
Long Beach, California
Camarillo Marathon, Half Marathon, 10K & 5K logo
August 3, 2025
500-1000 runners
Camarillo, California
August 3, 2025
100-500 runners
Long Beach, California
Skyline 50k logo
August 3, 2025
500-1000 runners
Castro Valley, California
Beer Creek
August 9, 2025
100-500 runners
Lafayette, California
August 9, 2025
1-100 runners
Santa Monica, California
August 9, 2025
1-100 runners
Santa Monica, California
Noyo Headlands Race Marathon Half Marathon 10k & 5k logo
August 9, 2025
1-100 runners
Fort Bragg, California
August 9, 2025
1-100 runners
Gilroy, California
August 10, 2025
1-100 runners
Long Beach, California
Humboldt Bay Marathon & Half Marathon logo
August 10, 2025
100-500 runners
Eureka, California
August 10, 2025
1-100 runners
Long Beach, California
August 10, 2025
500-1000 runners
Shaver Lake, California
Sundae Funday - Ice Cream Run 5K, 10K, and Half Marathon
August 10, 2025
100-500 runners
Long Beach, California

Running in California

FAQ

What are the most popular California half marathons?

The three most popular California half marathons are the Rock ‘n’ Roll San Diego Half Marathon with over 10,000 runners, the Napa to Sonoma Wine Country Half Marathon with over 6,800 runners, and the Monterey Bay Half Marathon with over 6,300 runners.

What’s the best half marathons in California for beginners in 2025?

There’s a ton of competition for the best California half marathons for beginners. But, we most frequently recommend the OC Marathon & Half Marathon, the Napa Valley Half Marathon, the Rock ‘n’ Roll San Diego Half Marathon and the Surf City Half Marathon as well produced races with beautiful courses and big crowds. If you’re willing to travel, here’s our full list of best half marathons for beginners.

Which months can I run a half marathon in California?

You can run a half marathon in California in January, February, April, May, June, July, August, September, October, November, and December.

What are the best California half marathons?
Every year, we rank our favorite and most scenic California half marathons. This year, we rated San Diego Beach & Bay, the OC Half Marathon, Santa Rosa Half Marathon, and the Surf City Marathon amongst our favorites.

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