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California Trail Running Calendar 2026-2027

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Monthly updates for California

Get new running races (and updates) in your inbox every month.

Explore the best trail runs in California for 2026-2027! Our updated list features 274 exciting races across the region. Find your next race in California below and join the running community at these great events!

January 2026
Jan
10
Sa

San Diego 50 Mile & Trail Marathons

Trail Run 3 mi 5 mi ... 26 mi 50 mi
Jan
10
Sa

The IPA Trail Runs

Trail Run 5 km 12 km
Jan
10
Sa

Inside Trail - No Hands Trail Run

Trail Run 8 km Half Marathon 35 km 50 km
Jan
10
Sa

Hope in Every Step 5K - Modesto

Trail Run 5 km
Jan
10
Sa

Double Double Double 50K

Trail Run 50 km
Jan
10
Sa

OC Trail Runners Group Run

Trail Run 8 mi
Jan
11
Su

Sycamore Island 10K Run

Trail Run 5 km 10 km
Jan
18
Su

Crystal Springs (Winter) Trail Run

Trail Run 8 km Half Marathon ... Marathon 50 km
Jan
18
Su

Crystal Springs Trail Run

Trail Run 8 km Half Marathon ... Marathon 50 km
Jan
24
Sa

La Cuesta Ranch Trail Run

Trail Run 10 km 20 km 30 km
Jan
24
Sa

Folsom Lake Sweetwater Trail Run

Trail Run 5 km 10 km ... Marathon 50 km
Jan
24
Sa

The Gumby 10k

Trail Run 3 mi 6 mi
Jan
24
Sa

Pacifica Foothills Trail Run

Trail Run 6 mi 13 mi 19 mi
Jan
24-25
Sa - Su

Golden Gate Trail Classic

Trail Run 15 km 25 km 50 km 50 mi
Jan
25
Su

Calico Trail Run

Trail Run 30 km 50 km
Jan
25
Su

Hollywood Sign Run

Trail Run 5 km 8 km 8 mi
Jan
25
Su

Mt. Hollywood 12K Trail Run Hike

Trail Run 5 km 8 km 8 mi
Jan
31
Sa

Sean O'Brien 100K

Trail Run 30 km 26 mi ... 50 mi 100 km
Jan
31
Sa

Coyote Hills Run

Trail Run 5 km 10 km Half Marathon
Jan
31
Sa

Jed Smith Ultra

Trail Run Half Marathon 30 km ... 50 km 50 mi