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 11279 exciting races across the country. Find your next race in the United States below and join the running community at these great events!

July 2026
Jul - Aug
31-1
Fr - Sa

Rocky Mountain Half Marathon

5 km Half Marathon
Jul - Aug
31-2
Fr - Su

Ragged 75 Stage Race and 50K

Trail Run 23 mi 24 mi 33 mi
August 2026
Aug
1
Saturday

Savage Race - Boston

Obstacle Run 3 mi 7 mi
Aug
1-2
Sa - Su

Tough Mudder - Indiana

Obstacle Run 5 km 15 km
Aug
1-2
Sa - Su

Asheville Spartan Event Weekend

Obstacle Run 5 km 10 km
Aug
1-2
Sa - Su

Badger Trail Races

Half Marathon Marathon ... 100 km 100 mi
Aug
1
Saturday

Waldo 100K

Trail Run
Aug
1
Saturday

Captain Bill Gallagher Island Run

10 mi
Aug
1
Saturday

Triathamom

Triathlon
Aug
1
Saturday

Sheep Mountain Ultras

Trail Run Half Marathon 50 km 50 mi
Aug
1
Saturday

HaRUNbee 5K Walk/Run

5 km
Aug
1
Saturday

College of DuPage Alumni 5k

5 km
Aug
1
Saturday

Houtzdale Days 5K Run/Walk

5 km
Aug
1
Saturday

Do it For Derraick

5 km
Aug
1
Saturday

Live Like Jack 5k

5 km
Aug
1-2
Sa - Su

Hood Hundred

Trail Run 100 mi
Aug
1-2
Sa - Su

Loopy Looper

Backyard Ultra 12 hr 101 mi 24 hr
Aug
1-2
Sa - Su

Volcanic 50

Trail Run 25 km 50 km
Aug
1-2
Sa - Su

Bridge of the Gods Run

5 km 10 km Half Marathon
Aug
1
Saturday

US Road Running - Piedmont

5 km 10 km Half Marathon
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