Half-Marathon races in California, United States — 2026 running calendar

Apr

17

Badger Cove

Livermore, California, United States

$35.00 - $90.00

Running

Half-Marathon 10K 5K

Apr

17

Run for the Planet -An Earth Day Run by CaliFlow Runs - 5K, 10K, Half Marathon

Long Beach, California, United States

$25.00 - $48.99

Running

5K 10K Half-Marathon 1.6K

Apr

17

Horseshoe Lake Trail Run

Los Gatos, California, United States

Free - $90.00

Trail running Running

8.2K Half-Marathon 30K Marathon +2

Apr

18

Run for the Planet – 5K, 10K, 10M, and Half Marathon

Santa Monica, California, United States

$24.50 - $38.50

Running

5K 10K Half-Marathon

Apr

18

Dolphin Dash – 5K, 10K, and Half Marathon

Santa Monica, California, United States

$24.50 - $38.50

Running

5K 10K Half-Marathon

Apr

24

Run for Donut San Diego

San Diego, California, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Apr

24

American River Parkway Half Marathon

Carmichael, California, United States

Running

Half-Marathon 5K 0.8K

Apr

24

SPASM Lake Chabot Trail Run

Castro Valley, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 28.8K Marathon +2

Apr

24

Run for Donut Sacramento

Sacramento, California, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Apr

24

Run for Donut San Francisco

San Francisco, California, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Apr

24

Nail the Rail Half Marathon, 10K & 5K

Shasta Lake, California, United States

$29.00 - $69.00

Running

Half-Marathon 10K 5K

May

01

The Hoag OC Marathon Running Festival

Costa Mesa, California, United States

Free - $194.00

Running

5K Half-Marathon Marathon Charity Half Marathon +15