Triathlon Calendar United States 2025-2026

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Explore the best triathlons in the United States for 2025-2026! Our updated list features 11199 exciting races across the country. Find your next race in the United States below and join the running community at these great events!

August 2025
Aug
9
Saturday

Swift Bear Trail Run - Hays

Trail Run 10 mi 20 mi 50 km
Aug
9-10
Sa - Su

Wy’East Trailfest

Trail Run 5 mi 9 mi ... 31 mi 50 mi
Aug
9
Saturday

Goodyear Half Marathon

10 km 21 km
Aug
9
Saturday

Watermelon Dash 10K

5 km 10 km
Aug
9
Saturday

Hobby Trails to You!

Trail Run 5 km 10 km
Aug
9
Saturday

MD Heat Trail Race

Trail Run 25 km 50 km
Aug
9
Saturday

Beast Of Burden - Summer

Trail Run 25 mi 50 mi 100 mi
Aug
9
Saturday

Ruck for the Fallen

Obstacle Run 10 km
Aug
9
Saturday

Gopher to Badger Half Marathon

5 km 10 km 13 mi
Aug
9-10
Sa - Su

Eastern States 100

Trail Run 100 mi
Aug
9
Saturday

Third Winchester Battlefield Half

Trail Run 5 km 10 km 21 km
Aug
9
Saturday

Eddy Trail Races

Trail Run 13 mi 50 km
Aug
9
Saturday

Haulin Aspen

Trail Run 6 mi 13 mi 26 mi
Aug
9
Saturday

UTE 100

Trail Run 50 km 50 mi 100 mi
Aug
9
Saturday

Madison Mini Marathon

5 km 21 km
Aug
9
Saturday

High Point Triathlon

Triathlon
Aug
9
Saturday

Kat'cina Mosa 100k Mountain Run

Trail Run 100 km
Aug
9
Saturday

Old Plank Sunset Half

13 mi
Aug
9
Saturday

Running Between the Vines

5 km 5 mi 13 mi
Aug
9
Saturday

Aravaipa Running - Vertigo Night Runs

Trail Run 6 km 10 km ... 31 km 52 km
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