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 12352 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
29-31
Fr - Su

Tejas Dirt Festival

Trail Run 5 mi 25 km 50 km
Aug
29
Friday

Goats in the Dark

Trail Run 5 km
Aug
29
Friday

Dark Knight Trail Run - Helena, MT

Trail Run 5 km
Aug
29-31
Fr - Su

The Blood Run - Lennox, SD

Backyard Ultra 3 hr 6 hr ... 24 hr 36 hr
Aug
29
Friday

Cabernet Canter Cross Country 10K

Trail Run 5 km 10 km
Aug
29
Friday

First Responders 5K

5 km
Aug
29
Friday

Trifest for MS

Triathlon
Aug
29
Friday

Run-De-Vous

Trail Run 21 km 42 km ... 100 km 100 mi
Aug
29-31
Fr - Su

The Ultimate Suck

Obstacle Run 4 hr 12 hr 36 hr
Aug
29-30
Fr - Sa

Belmar Five Mile

5 km 5 mi
Aug
29
Friday

The Tom Donnelly Hall of Fame 5k

5 km
Aug
29
Friday

KY Dam Glow 5K

5 km
Aug
29
Friday

JRR Prediction Run

5 km
Aug
29
Friday

ToM Opening Night

Trail Run 5 km
Aug
29
Friday

Friday Night Lights Elon Opener

Trail Run 4 km 6 km
Aug
29
Friday

Let's Glow NEJ Jungle Run 5K

5 km
Aug
29
Friday

iTRI365 ReRUN 5K Race Simulation

Aug
29
Friday

Loop the Lake - Traverse City

Trail Run
Aug
29-30
Fr - Sa

Dusk to Dawn Ultra

Trail Run
Aug
29-30
Fr - Sa

Warrior Foundation Events Fundraiser for Childhood Cancer

5 km 30 mi
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