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Trail Running Calendar United States 2025-2026

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Explore the best trail runs in the United States for 2025-2026! Our updated list features 825 exciting races across the country. Find your next race in the United States below and join the running community at these great events!

May 2026
May
3
Sunday

The Blue 2 Blue Challenge

Trail Run 50 km
May
3
Sunday

Dandelion Dash

Trail Run 5 km
May
4-9
Mo - Sa

Cocodona 250

Trail Run 39 mi 79 mi ... 126 mi 257 mi
May
4
Monday

Bradshaw Brute 100

Trail Run 100 mi
May
5-7
Tu - Th

Mingus Traverse

Trail Run 79 mi
May
6-9
We - Sa

Sedona Canyons 125

Trail Run 126 mi
May
8-9
Fr - Sa

Friends of Yellow River State Forest Trail Run

Trail Run 5 km 10 km Half Marathon
May
8
Friday

Hellbender 100

Trail Run 100 mi
May
8-9
Fr - Sa

Flagstaff Crest 38

Trail Run 39 mi
May
8-9
Fr - Sa

Tiger Claw

Trail Run 3 mi 50 km
May
9
Saturday

Muddy Crudd's Ultra Trail Party

Trail Run 5 km 6 hr 12 hr
May
9
Saturday

EHQ Valley Falls 12 Hour

Trail Run 6 hr 12 hr
May
9
Saturday

Muir Woods Marathon

Trail Run 7 mi Half Marathon Marathon
May
9
Saturday

F^3 Cap Sauers Trail Marathon

Trail Run
May
9
Saturday

Tarc Wapack and Back

Trail Run 22 mi 43 mi 50 mi
May
9
Saturday

Waves & Whales 5K Trail Run

Trail Run 5 km
May
9
Saturday

Race4Warriors Half Marathon

Trail Run 5 km 10 km Half Marathon
May
9
Saturday

Mighty Mountain Run

Trail Run 5 km 10 km
May
9
Saturday

Southern Paws Animal Rescue 5k

Trail Run 5 km
May
9
Saturday

Grizzly Peak Trail Run

Trail Run 10 km Half Marathon ... Marathon 50 km
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