Race Discovery

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

31 events found

Cinderella Trail Run logo
Jun
05

Cinderella Trail Run

Oakland, California, United States
Free - $90.00
Trail running Running
8K Half-Marathon 30K Marathon +3
Lake Chabot Trail Challenge (Half Marathon & 5K) logo
Jun
06

Lake Chabot Trail Challenge (Half Marathon & 5K)

Castro Valley, California, United States
$40.00 - $65.00
Trail running
Half-Marathon 5K
SPASM Crystal Springs Trail Run logo
Aug
29

SPASM Crystal Springs Trail Run

Woodside, California, United States
Trail running Running
10K Half-Marathon 35.4K Marathon +2
Redwood (Summer) Trail Run logo
Aug
15

Redwood (Summer) Trail Run

Oakland, California, United States
Trail running Running
8K Half-Marathon 30K Marathon +2
SAR Wild Run logo
Aug
09

SAR Wild Run

Shaver Lake, California, United States
Trail running
Half-Marathon 10K 5K 3.2K
San Lorenzo River Trail Run logo
Jul
11

San Lorenzo River Trail Run

Santa Cruz, California, United States
Trail running Running
10.1K Half-Marathon 30K Marathon +3
The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual) logo
Jun
26

The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)

Castro Valley, California, United States
Running Trail running
5K 10K Half-Marathon +2