Half Marathons in California, United States 2026
21.1 kilometres (13.1 miles) — the bridge between the 10K and the full marathon. Browse upcoming events in United States.
39 upcoming races
Upcoming Races
Running
Catalina Island Half-Marathon & 10K
Nov 14, 2026Avalon, USA
Run 21 m
Running
Berkeley Half Marathon 2026
Nov 14, 2026Berkeley, USA
Run 21 m
Running
2026 Death Valley Trail Marathon & Half Marathon
Dec 5, 2026Death Valley, USA
Run 21 m
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2026 Hark the Herald Half Marathon & 10K
Dec 12, 2026Tiburon, USA
Run 10 m
Running
3rd Annual Santa’s Reindeer Run - 5K, 10K, and Half Marathon
Dec 20, 2026Huntington Beach, USA
Run 5 m
Running
Define Your Glow 5K, 10K, Half Marathon by Califlow Runs
Jan 16, 2027Long Beach, USA
Run 5 m
Running
2027 CARLSBAD MARATHON, HALF MARATHON & 5K
Jan 17, 2027Carlsbad, USA
Run 5 m
Running
Besties Run 5K. 10K. Half Marathon , & Kids Dash
Feb 7, 2027Long Beach, USA
Run 5 m
Running
Women's Half Marathon San Diego 2027
Feb 27, 2027San Diego, USA
Run 21 m
Running
Disco Miles: Beachfront Boogie 5K, 10K, Half Marathon by Califlow Runs
Mar 6, 2027Long Beach, USA
Run 5 m
Running
2027 Moonlight Beach Half Marathon, 10k & 6k
Mar 14, 2027Encinitas, USA
Run 10 m
Running
2027 GOVX San Diego Half Marathon & 5K
Mar 21, 2027San Diego, USA
Run 5 m
Running
Annadel Half Marathon
Apr 17, 2027Santa Rosa, USA
Run 21 m
Running
Santa Cruz Westside Half Marathon 10k/5k
Apr 18, 2027Santa Cruz, USA
Run 10 m
Running
Mt. Diablo Half Marathon
Apr 24, 2027Walnut Creek, USA
Run 21 m
Running
American River Parkway Half Marathon 2027
Apr 24, 2027Carmichael, USA
Run 21 m
Running
Windsor Half Marathon 10K & 5K
May 15, 2027Windsor, USA
Run 10 m
Running
Venice Beach Half Marathon and 5k
May 16, 2027Santa Monica, USA
Run 5 m
Running
San Jose Half Marathon & 8K
Jun 6, 2027San Jose, USA
Run 8 m