5K 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

07

Epicpalooza

Moorpark, California, United States

$55.00 - $75.00

Trail running

10K 5K

Nov

14

Konocti Climb 5K

Kelseyville, California, United States

$55.00

Trail running

5K

Nov

14

Slo Ranch Fun Run 5K

San Luis Obispo, California, United States

$10.00 - $40.00

Trail running

5K 3K 1K

Nov

14

ZombieRunner Quarry Lakes

Fremont, California, United States

Free - $70.00

Trail running Running

5K 10K Half-Marathon 3.2K +4

Nov

15

Patagonia Salmon Run 5K

Ventura, California, United States

$55.00

Running

5.1K

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

The Wild Turkey

Granite Bay, California, United States

Free - $45.00

Trail running Running

5K 10K 1K

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

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