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

Jan

09

San Diego 50 & Trail Runs

Escondido, California, United States

$15.00 - $155.00

Trail running Running

Ultra Marathon Half-Marathon 16.1K +6

Jan

17

Crystal Springs Trail Run

Woodside, California, United States

$60.00 - $90.00

Trail running

8K Half-Marathon 35.4K Marathon +1

Feb

06

Golden Gate Trail Run

Sausalito, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 30K Marathon +2

Feb

20

Montara Mountain Trail Run

Pacifica, California, United States

Free - $90.00

Trail running Running

10K Half-Marathon 33.3K Marathon +3

Mar

13

Zoom San Francisco

San Francisco, California, United States

Free - $70.00

Trail running Running

5K 10K Half-Marathon 3.2K +4

Mar

20

VALENCIA Trail Race

Valencia, California, United States

$87.00 - $167.00

Trail running

Ultra Half-Marathon 10K

Mar

20

Redwood (Spring) Trail Run

Oakland, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 29.5K Marathon +5

Apr

03

Bedrock Valley Trail Runs

Hemet, California, United States

$15.00 - $115.00

Trail running Running Cycling

Marathon Half-Marathon 15K 10K +9

Apr

10

Nature Made Great Race: Half Marathon, 5K, 10K, 15K, 10M, 1M

Agoura Hills, California, United States

$33.49 - $92.45

Trail running Running

Half-Marathon 10K 16.6K 15K +3

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

24

SPASM Lake Chabot Trail Run

Castro Valley, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 28.8K Marathon +2

May

08

Grizzly Peak Trail Run

Berkeley, California, United States

Free - $90.00

Trail running Running

10K Half-Marathon 30K Marathon +3