Half Marathons in California, United States 2026 22 events
21.1 kilometres (13.1 miles) — the bridge between the 10K and the full marathon. Browse upcoming events in United States.
Upcoming races
RunningTomorrow
2026 Silver Strand Veterans Day Half Marathon, 10 Miler, 12K & 5K - San Diego
◎ Coronado, USA▤ Nov 8, 2026
21.1 km
RunningTomorrow
Santa Barbara Half Marathon & 5K
◎ Santa Barbara, USA▤ Nov 8, 2026
5 km
RunningTomorrow
Monterey Bay Half Marathon
◎ Monterey, USA▤ Nov 8, 2026
21.1 km
RunningIn 7 days
Catalina Island Half-Marathon & 10K
◎ Avalon, USA▤ Nov 14, 2026
21.1 km
RunningIn 7 days
Berkeley Half Marathon 2026
◎ Berkeley, USA▤ Nov 14, 2026
21.1 km
RunningIn 4 weeks
2026 Death Valley Trail Marathon & Half Marathon
◎ Death Valley, USA▤ Dec 5, 2026
21.1 km
RunningIn 5 weeks
2026 Hark the Herald Half Marathon & 10K
◎ Tiburon, USA▤ Dec 12, 2026
10 km
RunningIn 6 weeks
3rd Annual Santa’s Reindeer Run - 5K, 10K, and Half Marathon
◎ Huntington Beach, USA▤ Dec 20, 2026
5 km
RunningIn 2 months
Define Your Glow 5K, 10K, Half Marathon by Califlow Runs
◎ Long Beach, USA▤ Jan 16, 2027
5 km
RunningIn 2 months
2027 CARLSBAD MARATHON, HALF MARATHON & 5K
◎ Carlsbad, USA▤ Jan 17, 2027
5 km
RunningIn 3 months
Besties Run 5K. 10K. Half Marathon , & Kids Dash
◎ Long Beach, USA▤ Feb 7, 2027
5 km
RunningIn 4 months
Women's Half Marathon San Diego 2027
◎ San Diego, USA▤ Feb 27, 2027
21.1 km
RunningIn 4 months
Disco Miles: Beachfront Boogie 5K, 10K, Half Marathon by Califlow Runs
◎ Long Beach, USA▤ Mar 6, 2027
5 km
RunningIn 4 months
2027 Moonlight Beach Half Marathon, 10k & 6k
◎ Encinitas, USA▤ Mar 14, 2027
10 km
RunningIn 4 months
2027 GOVX San Diego Half Marathon & 5K
◎ San Diego, USA▤ Mar 21, 2027
5 km
RunningIn 5 months
Annadel Half Marathon
◎ Santa Rosa, USA▤ Apr 17, 2027
21.1 km
RunningIn 5 months
Santa Cruz Westside Half Marathon 10k/5k
◎ Santa Cruz, USA▤ Apr 18, 2027
10 km
RunningIn 6 months
Mt. Diablo Half Marathon
◎ Walnut Creek, USA▤ Apr 24, 2027
21.1 km
RunningIn 6 months
American River Parkway Half Marathon 2027
◎ Carmichael, USA▤ Apr 24, 2027
21.1 km
RunningIn 6 months
Windsor Half Marathon 10K & 5K
◎ Windsor, USA▤ May 15, 2027
10 km