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Upcoming Half Marathons Near Livermore, CA

Browse all California Half Marathons in 2026 and 2027 by month and by City below. For each race, you’ll find the history of the half marathon and the course, the most recent year’s course maps, elevation profiles, runner reviews, pricing, and how to sign up.

We dedicate  hours every month searching for races to include in the California Half Marathons calendar. If you happen to see any half marathon not included, contact us at info@halfmarathons.net to submit your race.

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June 29, 2026
1-100 runners
Castro Valley, California
July 18, 2026
100-500 runners
Castro Valley, California
August 1, 2026
100-500 runners
San Leandro, California
Skyline 50k logo
August 2, 2026
500-1000 runners
Castro Valley, California
Beer Creek
August 8, 2026
100-500 runners
Lafayette, California
August 15, 2026
100-500 runners
Fremont, California
September 6, 2026
1-100 runners
Clayton, California
September 13, 2026
1-100 runners
Brentwood, California
September 19, 2026
100-500 runners
San Ramon, California
Rock ‘n’ Roll San Jose Half Marathon & 10k logo
October 4, 2026
1,000-10,000 runners
San Jose, California
October 17, 2026
1-100 runners
Walnut Creek, California
Beer City Half Bishop Ranch logo
October 25, 2026
1-100 runners
San Ramon, California
October 31, 2026
1-100 runners
San Jose, California
Lake Chabot 50k Marathon 30k Half Marathon & 8k logo
November 7, 2026
100-500 runners
Castro Valley, California
Zoom Turkey Trot Half Marathon 10k & 5k logo
November 26, 2026
100-500 runners
San Jose, California
November 28, 2026
100-500 runners
Fremont, California
December 5, 2026
100-500 runners
Fremont, California
December 31, 2026
500-1000 runners
Castro Valley, California
January 1, 2027
100-500 runners
Castro Valley, California
March 7, 2027
1,000-10,000 runners
Livermore, 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 2026?

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 MarathonSanta Rosa Half Marathon, and the Surf City Marathon amongst our favorites.

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