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 10391 exciting races across the country. Find your next race in the United States below and join the running community at these great events!

March 2026
Mar
14
Saturday

Old West Trail Runs

Trail Run 13 mi 26 mi 50 km
Mar
14
Saturday

Mesquite Canyon

Trail Run 8 km 13 mi ... 50 km 50 mi
Mar
14
Saturday

Two Prairies Ultra

Trail Run 30 km 50 km
Mar
14
Saturday

Llama Experience Ultra

Backyard Ultra 3 hr 6 hr 12 hr
Mar
14-15
Sa - Su

Beast of the Backroads

5 km 10 mi
Mar
14
Saturday

Kirkland Shamrock Run

5 km 10 km
Mar
14
Saturday

Shamrock'n Weekend

5 km 10 km 13 mi
Mar
14
Saturday

Chase Race and Paws

2 mi 3 mi
Mar
14
Saturday

Santa Barbara Nine Trails

Trail Run 17 mi 35 mi
Mar
14
Saturday

Peyton's Wild and Wacky

Trail Run 5 km
Mar
14
Saturday

Nine Trails 35 Mile Endurance Run

Trail Run 17 mi 35 mi
Mar
14
Saturday

St. Patrick's Music City Half Marathon

5 km 10 km 13 mi
Mar
14
Saturday

San Diego Leprechaun Run

5 km
Mar
14
Saturday

Lebanon Shamrock Shuffle

5 km
Mar
14
Saturday

Tombstone 50 Trail Run

Trail Run 30 km 50 km 50 mi
Mar
14
Saturday

Ruck a Chuck 50K

Trail Run 50 km
Mar
14
Saturday

TRI 4 THE CURE AZ Triathlon

Triathlon
Mar
14
Saturday

Okie Half Marathon

5 km 13 mi
Mar
14
Saturday

Little Backyard Adventure

Backyard Ultra 3 hr 6 hr 12 hr
Mar
14
Saturday

Flora-Bama's Beach Run/Walk for America's Warriors

5 km 10 km
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