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

Oct

31

ZombieRunner Halloween

San Jose, California, United States

Free - $80.00

Trail running Running

5K 10K Half-Marathon Marathon +6

Nov

07

Lake Chabot Trail Run

Castro Valley, California, United States

Free - $90.00

Trail running Running

7.7K Half-Marathon 30K Marathon +4

Nov

14

Catalina Island Half-Marathon & 10K

Avalon, California, United States

$25.00 - $165.00

Trail running Running

Half-Marathon 10K 1K

Nov

14

ZombieRunner Quarry Lakes

Fremont, California, United States

Free - $70.00

Trail running Running

5K 10K Half-Marathon 3.2K +4

Nov

26

Zoom Turkey Trot

San Jose, California, United States

Free - $70.00

Trail running Running

5K 10K Half-Marathon 3.2K +4

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

Redwood (Spring) Trail Run

Oakland, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 29.5K Marathon +5

Mar

20

VALENCIA Trail Race

Valencia, California, United States

$107.00 - $187.00

Trail running

Ultra Half-Marathon 10K