🇺🇸 United States
California Trail Running Races 2026
4 upcoming trail and ultra races across California, from 25–345 km with up to 9,450 m of climbing. Browse the 2026 calendar below, or filter the full database by distance and terrain.
2026 race calendar
Open in finder → Mar 7, 2026
Marin Ultra Challenge
🇺🇸 Sausalito, California
25 / 50 / 80 km 3,000 m climb ★★★★★
Jun 27, 2026
Western States 100
🇺🇸 Olympic Valley, California
161 km 5,500 m climb ★★★★★
Sep 26, 2026
Mammoth Trailfest
🇺🇸 mammoth lakes, California
26 / 50 km 2,130 m climb
Oct 2, 2026
The Mammoth
🇺🇸 Mammoth Lakes, California
345 km 9,450 m climb
Trail running by city in California
Frequently asked
How many trail races are there in California in 2026?
We list 4 upcoming trail and ultra races in California, United States, ranging from 25–345 km.
What is the toughest trail race in California?
The biggest climb on our list is 9,450 m of elevation gain — see the full ranking below and filter by difficulty.
More trail races in United States
New California races, in your inbox
Get notified when a new trail race is added near California.
Set up an alert