United States
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Alabama11
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Alaska8
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Arizona11
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Arkansas4
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California46
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Colorado10
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Connecticut4
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Delaware4
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District of Columbia
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Florida55
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Georgia13
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Hawaii1
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Idaho14
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Illinois25
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Indiana27
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Iowa9
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Kansas5
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Kentucky9
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Louisiana4
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Maine7
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Maryland18
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Massachusetts18
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Michigan29
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Minnesota20
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Mississippi4
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Missouri14
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Montana7
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Nebraska5
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Nevada
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New Hampshire1
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New Jersey28
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New Mexico3
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New York64
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North Carolina30
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North Dakota1
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Ohio16
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Oklahoma8
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Oregon12
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Pennsylvania21
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Puerto Rico1
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Rhode Island2
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South Carolina13
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South Dakota
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Tennessee23
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Texas51
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Utah15
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Vermont
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Virginia37
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Washington17
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West Virginia7
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Wisconsin26
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Wyoming3
Triathlon Calendar United States 2026-2027
Monthly updates for United States
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in the United States for 2026-2027! Our updated list features 757 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
Challenge yourself at the Square Lake Sprint Triathlon in Stillwater with a fast swim, bike and run at scenic Square Lake Park. Cap the day with a post race barbecue, awards and free pro photos in a family friendly atmosphere.
Race the DeGray Lake Triathlon festival at scenic DeGray Lake near Caddo Valley on September 13, 2026. Multiple triathlon, duathlon and open water swim options welcome solo athletes and teams for a lakeside race day.
Rev3 Back Bay returns to Snow Hill, Maryland on September 13, 2026, offering sprint triathlon, duathlon, aquabike and relay options at Public Landing. Swim from the beach, enjoy flat roads and a scenic out and back run.
Join the Zoom RedHawk Triathlon & Multisport Festival at Hueston Woods Beach for triathlons, duathlons, aquabikes, open swims and runs across beginner to 1/3 Iron distances. Enjoy a finisher medal, event tee and catered post race food.
Valkyrie Multisport Relay in Durango on Sept 19, 2026 invites teams and solo racers to take on seven stages blending trail run, mountain and road biking, paddleboard, swim, river paddle and road run. Choose full or sprint courses or tackle the Ultra..
IRONMAN Maryland in Cambridge is a full distance 140.6 triathlon with a river swim, scenic bike through Blackwater National Wildlife Refuge, and a flat downtown run. Fast course and World Championship qualification make it a top pick.
Join She Tris Sprint Triathlon in Summerville on September 19, 2026 celebrating women and girls with multiple formats and virtual options. Enjoy a pool swim, three loop bike course, flat 2 mile run and a lively finish line party with swag.
TOUGHMAN Westchester returns to Rye Playland on September 19 and 20, 2026, with Olympic distance races, aquabike, a 1 mile open water swim and TOUGHKids youth races. Race solo or on a relay and enjoy a scenic, festival style weekend.
Durango's Valkyrie Relay is a scenic multisport team or solo challenge across trails, roads, lakes and the Animas River with full and sprint courses. Teams up to nine or solo Ultra Heptathletes combine running, biking, SUP and paddling.
Make a splash at the Texas City Triathlon, Duathlon and Aquabike in September in Texas City. Sprint distances welcome first timers and age group competitors with a sandy swim, fast bike on the dike and a scenic Bay Street Park run.
Join the Bear Lake Brawl Triathlon at scenic Bear Lake State Park in Idaho on September 19, 2026. Choose Sprint, Olympic, Half 70 1/3 or virtual races, with relay and alternate half distance formats to match your goal.
A fall sprint triathlon and 5k at Goose Pond Colony Resort in Scottsboro, Alabama, featuring a 500 meter swim, 14 mile bike and 5K run. The 5k uses the triathlon run route and triathlon entries follow USAT rules.
Take on the scenic New River Trail in Max Meadows with a three stage triathlon: 40 mile bike, 12.1 mile downriver kayak and 13.1 mile run along a flat crushed cinder trail beside the river. Solo and team entries welcome.
Race around scenic Tims Ford Lake at the Winchester Lakeside Triathlons on September 19, 2026 in Winchester Tennessee. Sprint and Olympic triathlon, duathlon, aquabike and relay options welcome all abilities.
Test your navigation and endurance in the Pisgah 12 Hour Adventure Race at Lake James State Park. Solo racers or teams up to four will bike, paddle and bushwhack across varied terrain to punch as many checkpoints as possible in 12 hours.
Join the Rexburg RUSH Triathlon at Wakeside Lake on September 19, 2026, with Sprint and Olympic triathlons plus duathlons and team options. Produced by TRI PEAKS EPIC EVENTS, this popular lakeside race welcomes all levels.
Challenge yourself at the Harvest Hammer Duathlon in Morrison: a 5k run followed by a 21 mile bike, with run only and team entries allowed. Family friendly youth races, prizes, chip timing and Rotary supported proceeds make it a highlight.
IRONMAN 70.3 Washington Tri Cities in Richland offers a downriver swim, a rolling 56 mile bike through vineyards, and a flat 13.1 mile run along Columbia River waterfront. Enjoy a scenic finish at Columbia Point Park and nearby wineries.
Race IRONMAN 70.3 Michigan in Frankfort on September 20 2026. PLAYTRI will be onsite offering bike rentals, repairs and race ready tune ups so you can focus on the course. Reserve services early online.
Join the Devil's Challenge Triathlon on September 20, 2026 at Devil's Lake State Park in Baraboo for a scenic sprint featuring a lake swim, bluff bike and park run. Individual and relay entries available with shirt, medal, pro timing and photos.