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 11237 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
8-9
Fr - Sa

The Paavo Nurmi Marathon

5 km 13 mi 26 mi
Aug
8-10
Fr - Su

High Five 100 - Lake City, CO

Trail Run 100 mi
Aug
8
Friday

Jackson Covered Bridge 10K

10 km
Aug
8-9
Fr - Sa

Bear Country Night Trek

Trail Run 5 km 10 km 15 km
Aug
8-12
Fr - Tu

Bigfoot 200 Mile, 40 Mile, 20 Mile Endurance Runs

Trail Run 207 mi
Aug
8-10
Fr - Su

Kansas City Backyard Ultra

Trail Run 4 mi 3 hr ... 9 hr 12 hr
Aug
8-10
Fr - Su

Wyoming Range 100-Mile Endurance Run

Trail Run 105 mi
Aug
8-9
Fr - Sa

Choice City Running Festival

5 km 10 km 21 km
Aug
8
Friday

The Redmen Run

5 km
Aug
8
Friday

Sunset Scurry 10k

5 km 10 km
Aug
8
Friday

Wenona 5K

5 km
Aug
8
Friday

Slam the Dam Run

10 km
Aug
8
Friday

Radler Rush Cross Country 10k

5 km 10 km
Aug
8
Friday

Anchor Down Ultra

Backyard Ultra 6 hr 12 hr 24 hr
Aug
8-9
Fr - Sa

Run Baileys

Trail Run 5 km 21 km
Aug
8
Friday

Meridian Moonlight Run

2 mi 5 km
Aug
8-9
Fr - Sa

Columbia River Triathlon

Triathlon
Aug
8
Friday

Light Up the Night 5K

5 km
Aug
8
Friday

Wabash Cannonball 5K

5 km
Aug
8
Friday

Steady State Distance Festival

5 km
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