Half-Marathon races in California, United States — 2026 trail running calendar
31 events found
Oct
11
Bizz Johnson
Susanville, California, United States
Running
Ultra
Half-Marathon
10K
Oct
02
Sgrail Marin - Triathlon & Trail Half Marathon
San Rafael, California, United States
Triathlon
Running
Trail running
Kids "Fun" Event
Ultra
Half-Marathon
+1
Sep
11
The Honey Badger Half (& 10K/5K)
Santa Venetia, California, United States
Running
Trail running
5K
10K
Half-Marathon
+2
Sep
06
Mammoth Bar Trail Runs
Auburn, California, United States
Trail running
Half-Marathon
10K
Aug
29
SPASM Crystal Springs Trail Run
Woodside, California, United States
Trail running
Running
10K
Half-Marathon
35.4K
Marathon
+2
Aug
09
SAR Wild Run
Shaver Lake, California, United States
Trail running
Half-Marathon
10K
5K
3.2K
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
Bizz Johnson
Susanville, California, United States
Oct 11, 2026 (Sun)
Running
Ultra
Half-Marathon
10K
Sgrail Marin - Triathlon & Trail Half Marathon
San Rafael, California, United States
Oct 2, 2026 (Fri)
– Oct 4, 2026
Triathlon, Running, Trail running
Kids "Fun" Event
Ultra
Half-Marathon
+1
The Honey Badger Half (& 10K/5K)
Santa Venetia, California, United States
Sep 11, 2026 (Fri)
– Sep 14, 2026
Running, Trail running
5K
10K
Half-Marathon
+2
Mammoth Bar Trail Runs
Auburn, California, United States
Sep 6, 2026 (Sun)
Trail running
Half-Marathon
10K
SPASM Crystal Springs Trail Run
Woodside, California, United States
Aug 29, 2026 (Sat)
Trail running, Running
10K
Half-Marathon
35.4K
Marathon
+2
SAR Wild Run
Shaver Lake, California, United States
Aug 9, 2026 (Sun)
Trail running
Half-Marathon
10K
5K
3.2K
The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)
Castro Valley, California, United States
Jun 26, 2026 (Fri)
– Jun 29, 2026
Running, Trail running
5K
10K
Half-Marathon
+2