Trail running Race Calendar in California, United States

Oct

10

Ruth Anderson Memorial Endurance Run

San Francisco, California, United States

Free

Trail running Running

Ultra 7.2K

Oct

10

Ridge Creek Run Club 12 Hour Ultra

Dinuba, California, United States

$120.00

Trail running

12 Hour Ultra Lap Run

Oct

10

Rock It in Chino Hills 5K & 10K

Brea, California, United States

$60.00 - $75.00

Trail running

5K 10K

Oct

10

Rancho Cuyamaca State Park

Julian, California, United States

Trail running

Traditional - Beginner Traditional - Intermediate Traditional - Advanced

Oct

11

Bizz Johnson

Susanville, California, United States

Running

Ultra Half-Marathon 10K

Oct

17

SPACEROCK Trail Race

Agua Dulce, California, United States

$90.00 - $195.00

Trail running

22.4K 14.3K 10K 5K

Oct

17

The Jackalope Lope

Redding, California, United States

$65.00 - $90.00

Trail running

13.7K 33K Ultra

Oct

17

Lake Hodges Trail Festival

San Diego, California, United States

$15.00 - $145.00

Trail running Running Duathlon

50K 25.1K 15K 10.3K +7

Oct

17

Heart of Cool Trail Run

Cool, California, United States

$45.00 - $77.00

Trail running

5K 10K Half-Marathon

Oct

18

Fleet Feet Fall Classic - Trail October 18th, 2026

Chico, California, United States

$95.00

Trail running

Half-Marathon 6.4K

Oct

31

ZombieRunner Halloween

San Jose, California, United States

Free - $80.00

Trail running Running

5K 10K Half-Marathon Marathon +6

Oct

31

Ucsd Score-O

La Jolla, California, United States

$15.00

Trail running

Score-O