10K 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

Epicpalooza

Moorpark, California, United States

$55.00 - $75.00

Trail running

10K 5K

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

The Wild Turkey

Granite Bay, California, United States

Free - $45.00

Trail running Running

5K 10K 1K

Nov

26

Zoom Turkey Trot

San Jose, California, United States

Free - $70.00

Trail running Running

5K 10K Half-Marathon 3.2K +4

Nov

26

Running of the Turkeys 5K & 10K Trail Run

San Diego, California, United States

Free

Trail running Running

10K 5K

Jan

01

Auburn Resolution Run

Auburn, California, United States

$35.00 - $55.00

Trail running Running

5K 10K 16.1K

Feb

06

Dalton Canyon Ultra

Glendora, California, United States

$65.00 - $125.00

Trail running

Ultra 10K

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

13

Catalina Island Marathon, 10K, 5K

Avalon, California, United States

$25.00 - $396.00

Trail running Running

Marathon 10K 5K 1K +1