Half Marathons in California, United States 2026 35 events
21.1 kilometres (13.1 miles) — the bridge between the 10K and the full marathon. Browse upcoming events in United States.
Upcoming races
RunningIn 3 months
3rd Annual Santa’s Reindeer Run - 5K, 10K, and Half Marathon
◎ Huntington Beach, USA▤ Dec 20, 2026
5 km
RunningIn 4 months
Define Your Glow 5K, 10K, Half Marathon by Califlow Runs
◎ Long Beach, USA▤ Jan 16, 2027
5 km
RunningIn 4 months
2027 CARLSBAD MARATHON, HALF MARATHON & 5K
◎ Carlsbad, USA▤ Jan 17, 2027
5 km
RunningIn 5 months
Besties Run 5K. 10K. Half Marathon , & Kids Dash
◎ Long Beach, USA▤ Feb 7, 2027
5 km
RunningIn 6 months
Women's Half Marathon San Diego 2027
◎ San Diego, USA▤ Feb 27, 2027
21.1 km
RunningIn 6 months
Disco Miles: Beachfront Boogie 5K, 10K, Half Marathon by Califlow Runs
◎ Long Beach, USA▤ Mar 6, 2027
5 km
RunningIn 6 months
2027 Moonlight Beach Half Marathon, 10k & 6k
◎ Encinitas, USA▤ Mar 14, 2027
10 km
RunningIn 6 months
2027 GOVX San Diego Half Marathon & 5K
◎ San Diego, USA▤ Mar 21, 2027
5 km
RunningIn 7 months
Annadel Half Marathon
◎ Santa Rosa, USA▤ Apr 17, 2027
21.1 km
RunningIn 7 months
Santa Cruz Westside Half Marathon 10k/5k
◎ Santa Cruz, USA▤ Apr 18, 2027
10 km
RunningIn 7 months
Mt. Diablo Half Marathon
◎ Walnut Creek, USA▤ Apr 24, 2027
21.1 km
RunningIn 7 months
American River Parkway Half Marathon 2027
◎ Carmichael, USA▤ Apr 24, 2027
21.1 km
RunningIn 8 months
Windsor Half Marathon 10K & 5K
◎ Windsor, USA▤ May 15, 2027
10 km
RunningIn 8 months
Venice Beach Half Marathon and 5k
◎ Santa Monica, USA▤ May 16, 2027
5 km
RunningIn 9 months
San Jose Half Marathon & 8K
◎ San Jose, USA▤ Jun 6, 2027
8 km