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

May 2025
May
4
Sunday

White Lake Spring International

Triathlon
The White Lake Spring International & Sprint is a triathlon event taking place in White Lake, North Carolina. Scheduled for May 4, 2025, it features various race formats including the International In..
May
4
Sunday

Keep Texas Wild Triathlon

Triathlon
The Keep Texas Wild Triathlon is scheduled for May 4, 2025, in Mathis, Texas, at the Corpus Christi State Park. This exciting event features multiple race options, including a Sprint Triathlon, Mini-S..
May
7
Wednesday

Brick Endurance Summer Triathlon Series

Triathlon
The Brick Endurance Summer Triathlon Series is a sprint triathlon event held at Rolling View State Park in Durham, North Carolina. The series features four races throughout the summer, each consisting..
May
9
Friday

Goody Duathlon

Duathlon
The Goody Duathlon is an adaptive sports event taking place in Pulaski, Wisconsin, focused on inclusivity and accessibility. Participants can reserve essential adaptive equipment, including race chair..
May
10
Saturday

Pioneer Spirit Triathlon - Challenge

Triathlon
The Pioneer Spirit Triathlon, taking place in Petersburg, IL, features a variety of events including a 5k run/walk, mini triathlon, sprint triathlon, and a tri-challenge. This mid-spring tri-series ca..
May
10
Saturday

The Spirit of Kona Triathlon

Triathlon
The Spirit of Kona Triathlons is an exciting multi-sport event taking place at the Tellico Dam Recreation Area in Lenoir City, TN. Scheduled for May 10, 2025, the event features a variety of competiti..
May
10
Saturday

New River Splash Triathlon

Triathlon
The New River Splash Triathlon, Duathlon & 5k is an exciting multi-sport event taking place in Jacksonville, North Carolina, on May 10, 2025. Participants can choose from a triathlon, duathlon, or a 5..
May
10
Saturday

Ironman 70.3 St. George

Triathlon
The IRONMAN 70.3 St. George is a prestigious triathlon event held in St. George, Utah, known for its breathtaking landscapes and challenging course. Athletes compete in a stunning swim at Sand Hollow..
May
10
Saturday

Ironman 70.3 Gulf Coast

Triathlon
The IRONMAN 70.3 Gulf Coast is a premier triathlon event held in Panama City Beach, Florida, featuring a scenic course that includes a swim in the Gulf of Mexico, a fast bike ride through picturesque..
May
10
Saturday

Fly By Night Duathlon

Duathlon
The Fly By Night Duathlon is an exciting multi-sport event taking place at the historic Watkins Glen International racetrack in New York. Scheduled for May 10, 2025, the duathlon features various race..
May
10
Saturday

Ordinary Mortals Triathlon

Triathlon
The Ordinary Mortals Duathlon, scheduled for May 10, 2025, at Lake Pueblo State Park, features a unique format that includes a 3-mile trail run, a 15-mile bike ride, and a final 2-mile run. This event..
May
10
Saturday

Heart and Sole Triathlon

Triathlon
The Heart and Sole Triathlon, established in 2004, is set to take place in Versailles, Kentucky, on May 10, 2025. This sprint triathlon is open to participants aged 15 and older and features a 400-yar..
May
10
Saturday

Gator Grinder Triathlon

Triathlon
The Gator Grinder Triathlon, taking place in Canby, Oregon, is an engaging event designed for both novice and experienced triathletes. Participants can choose from various formats, including a Road Bi..
May
10
Saturday

Thunder in the Valley

Triathlon
Thunder in the Valley is a celebrated triathlon event taking place in Terre Haute, Indiana, marking its 40th anniversary in 2025. The event features a Sprint Triathlon, which includes a 500-meter swim..
May
10-11
Sa - Su

Kinetic Triathlon Festival

Triathlon
The Kinetic Triathlon Festival, taking place at Lake Anna State Park in Spotsylvania, VA, is a premier multisport event scheduled for May 10-11, 2025. This festival features a variety of races, includ..
May
10
Saturday

Swim Run Done Aquathalon

Aquathlon
The 5th Annual Swim Run Done Aquathalon is a competitive event taking place in St. Johns, FL, featuring a 1/2 mile swim followed by a 5k run. Organized by Tri with Skye and Ultimate Racing Inc., the r..
May
10
Saturday

Memphis In May Triathlon

Triathlon
The Memphis In May Triathlon Weekend is set for May 10, 2025, at Shelby Farms Park in Memphis, TN. This event features multiple races, including the Olympic Triathlon, which consists of a 1.5K swim, 4..
May
10
Saturday

AdventHealth Girlz on Fire Women's Triathlon

Triathlon
The AdventHealth Girlz on Fire Women's Triathlon & 5K is a vibrant event celebrating women in sports, taking place in Clermont, Florida. Scheduled for Mother's Day weekend, it features a variety of co..
May
10
Saturday

Fly By Night

Duathlon
May
11
Sunday

Cedar River Triathlon

Triathlon
The Cedar River Triathlon, taking place at Lake Wilderness in Maple Valley, WA, is a premier event in the 2025 triathlon season. Participants will engage in a 1/4 mile swim, a 14-mile off-road bike ri..
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