United States
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Alabama8
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Alaska7
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Arizona12
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Arkansas2
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California32
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Colorado7
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Connecticut3
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Delaware3
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District of Columbia
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Florida42
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Georgia12
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Hawaii1
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Idaho9
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Illinois14
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Indiana15
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Iowa6
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Kansas6
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Kentucky3
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Louisiana3
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Maine6
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Maryland10
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Massachusetts13
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Michigan19
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Minnesota16
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Mississippi3
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Missouri8
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Montana3
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Nebraska2
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Nevada
-
New Hampshire1
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New Jersey19
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New Mexico3
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New York40
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North Carolina25
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North Dakota
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Ohio8
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Oklahoma5
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Oregon9
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Pennsylvania16
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Puerto Rico
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Rhode Island
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South Carolina14
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South Dakota
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Tennessee18
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Texas38
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Utah10
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Vermont
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Virginia31
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Washington11
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West Virginia4
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Wisconsin22
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Wyoming2
Triathlon Calendar United States 2025-2026
Explore the best triathlons in the United States for 2025-2026! Our updated list features 542 exciting races across the country. Find your next race in the United States below and join the running community at these great events!
September 2026
Take on the Devil's Challenge Triathlon at Devil's Lake State Park in Baraboo, Wisconsin. This sprint race mixes a lake swim, scenic bluff bike and a 5K park run and closes the Wisconsin Triathlon Series.
Dive into the Wallis Sands Sprint Triathlon at Wallis Sands State Park in Rye, NH on Sept 20, 2026, with an ocean swim, scenic seacoast bike and 5K run. Open to solo, relay and virtual entrants, this seaside race suits beginners and seasoned racers a..
Join the Kiel Raider Nation Triathlon in September for sprint and aquabike races, a 5K and youth events for the whole family. Pool swims, relay teams and kids races make this a welcoming community day that benefits the Kiel High School Booster Club.
Diamond Mountain Triathlon at Lake Welch Beach in Stony Point on September 20, 2026 offers triathlon, duathlon and junior duathlon. Enjoy a scenic lake swim and a 15 mile bike loop around Harriman Park, suitable for all levels.
The Marsh Creek Sprint Triathlon in Downingtown PA features a scenic lake swim, 20 km bike and 5 km run at Marsh Creek State Park. Enter solo, aquabike or relay teams for ages 12 and up and enjoy swag, timed results and a post race meal.
Compete at the Robious Landing Triathlon in Chesterfield on September 20, 2026, with sprint, youth and Women's NCAA collegiate cup races across swim, bike and run. Finishers get medals and proceeds benefit the Live Red Foundation.
Push your limits at the Reston Triathlon on Sept 20, 2026 in Reston, VA with an open water Olympic swim, 25 mile bike and 10K run. Aquabike and Olympic relay options make it perfect for multisport racers of all levels.
Race the DQ Long Beach Island Triathlon, Duathlon and Aquabike on Sept 20 in Long Beach NJ. Enjoy scenic bay swims and flat, fast bike and run courses with solo, relay and junior options for ages 12 and up.
Join the Carlyle Lake Triathlon on Sunday, September 20, 2026 at Dam West Beach for sprint and Olympic distances featuring a beach swim, scenic flat bike and a run that finishes over the spillway. USAT sanctioned and benefiting NAMI, the day includes..
Race the Buzzard's Bay Sprint at Horseneck Beach in Westport, MA on Sept 20, 2026. Triathlon, duathlon, relay and aqua bike routes showcase coastal roads and a beach finish.
Celebrate triathlon at the Giant Acorn Triathlon Festival at Lake Anna State Park, featuring Olympic and Sprint distances plus aquabike and relays. Enjoy scenic lake swims, shaded park runs, a finisher medal and tech shirt.
Pick your race at the Tarpon Springs Sprint Triathlon, Duathlon, Aquabike or 5K at scenic Fred Howard Park. Swim off the beach, bike through historic Tarpon Springs and run inside the park, with medals for all finishers.
Take part in The Knights Fury Duathlon on Sept 26, 2026 at scenic Mendon Ponds Park in Honeoye Falls, NY. Two race options welcome teens and adults to test speed and stamina on a fast, friendly course.
PLAYTRI provides onsite bike rentals, repairs, tune ups, and bike builds at IRONMAN 70.3 New York at Jones Beach, so athletes can arrive race ready and stress free. Visit the Playtri store for rentals and race day support.
IRONMAN 70.3 New York brings a seaside half distance triathlon to Jones Beach with a sheltered swim, fast flat bike on the Wantagh Parkway, and a boardwalk run along the Atlantic. Expect a lively New York style finish.
Join the Mesa Sprint Triathlon at Skyline Aquatics Center in Mesa on Sept 26, 2026 and tackle a fast swim bike run course, or opt for the duathlon, relay or kids splash and dash. Finishers get a custom medal and early registrants secure shirts.
Kerrville Triathlon Festival brings multiple distances, relay options and a kids run to Kerrville TX with races across two days. Celebrate at a riverside after party with floating on the Guadalupe, free food and beer.
IRONMAN Chattanooga on Sept 27, 2026 is a full IRONMAN 140.6 with a fast downriver swim, rolling bike and a scenic downtown run. Pros and age groupers chase World Championship slots while enjoying warm Sept weather and onsite support.
Join the She Tris Sprint Triathlon in Huntersville, an all women event featuring a pool swim, rolling 8 mile bike and 2 mile run with youth divisions and relay options. Enjoy training support, a finishers keepsake and a festive race party.
Join ÖTILLÖ Swimrun Colorado on September 27, 2026 for a scenic blend of open water swims in Horsetooth Reservoir and trail runs through Lory State Park. Multiple distances suit teams and solos, all starting and finishing at Soldier Canyon.