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

Sep

06

Diablo Trail Run

Clayton, California, United States

Free - $100.00

Trail running Running

6.4K 16.1K Half-Marathon Marathon +2

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

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

Catalina Island Marathon, 10K, 5K

Avalon, California, United States

$25.00 - $396.00

Trail running Running

Marathon 10K 5K 1K +1

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

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