United States
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Alabama9
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Alaska7
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Arizona10
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Arkansas2
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California38
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Colorado8
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Connecticut3
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Delaware3
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District of Columbia
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Florida46
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Georgia13
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Hawaii1
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Idaho9
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Illinois15
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Indiana22
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Iowa8
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Kansas5
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Kentucky9
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Louisiana3
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Maine7
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Maryland11
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Massachusetts17
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Michigan27
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Minnesota16
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Mississippi3
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Missouri14
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Montana3
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Nebraska3
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Nevada
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New Hampshire
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New Jersey23
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New Mexico3
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New York51
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North Carolina30
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North Dakota
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Ohio13
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Oklahoma6
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Oregon9
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Pennsylvania16
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Puerto Rico
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Rhode Island1
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South Carolina14
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South Dakota
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Tennessee22
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Texas44
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Utah14
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Vermont
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Virginia33
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Washington13
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West Virginia5
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Wisconsin24
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Wyoming2
Triathlon Calendar United States 2025-2026
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 2025-2026! Our updated list features 632 exciting races across the country. Find your next race in the United States below and join the running community at these great events!
October 2026
Join the Castle Creek Triathlon at scenic Lake Pleasant on October 3, 2026 for Olympic and sprint distances plus duathlon, aquabike and kayak SUP options. Chip timing, finisher medals and post race refreshments make it a great day for racers of all l..
Explore the Driftless Region around Elkader, Iowa in Wild Driftless, an adventure race blending trekking, mountain biking and paddling through limestone bluffs, trout streams and scenic gravel roads. Pick a 9 hour full course or a 5 hour lite version..
Take part in Sandling Beach Triathlon at Falls Lake on October 3, 2026, offering Sprint and International distances plus Individual, Relay and AquaBike entries. The festival crowns the 2026 North Carolina Triathlon Series and welcomes racers.
Join the Grand River Color Tour Triathlon on October 3, 2026 in Eaton Rapids MI for kayaking, cycling, and a 5K finish showered in colorful powder. Choose the full triathlon, a 5K only, kayak rental, or a three person relay.
Challenge yourself at the TRI It Racing Clubs Du Kona multi sport series at scenic Mitchell Park Guthrie Lake with sprint, super sprint, aquabike and duathlon options for all levels. Youth under 12 can enter free with registration follow up.
Waterman's Triathlon Festival returns October 3 and 4, 2026 in Rock Hall, Maryland with half, Olympic and sprint races plus aquabike and relay options across two action packed days. Open to age group athletes, with medals, a tech shirt and a post rac..
Experience the Dam Tri at Lake Murray in Lexington with a 1000 m swim, a rolling 21 mile bike crossing the dam four times, and a 6 km out and back run on the dam. A scenic stop on the South Carolina Triathlon Series.
Join a scenic point to point tri through Idaho high country on October 3, 2026, from Warm Lake to Yellow Pine. Individual, relay and adaptive teams welcome with free local camping and an after party in Yellow Pine.
Take part in ÖTILLÖ Swimrun Colorado on October 4, 2026 in Fort Collins and Bellvue, combining open swims in Horsetooth Reservoir with trail runs through Lory State Park. Distances suit both sprint racers and World Series contenders alike.
Join Playtri Fort Worth Triathlon & Run Bike Run II for sprint and Olympic distances, relays, collegiate divisions and virtual options. USAT sanctioned and offering a Double Finisher Medal for athletes racing both events.
Race IRONMAN 70.3 Waco on October 4, 2026 at Indian Spring Park, with a Brazos River swim, flat bike and rolling run finishing on the Waco Suspension Bridge. Go for a World Championship spot amid warm fall weather and big local support.
MightyMan Montauk on October 4, 2026 offers Olympic and Sprint triathlon courses set in a scenic fishing and surfing town at the tip of Long Island. Multiple categories include relays, AquaBike and a high school division for teen athletes.
Face an epic endurance challenge at the Virginia ANVIL Ultra Triathlon Oct 8 to 10, 2026 at Lake Anna State Park with Single, 1.5x and Double options. Looped swim, bike and run courses, volunteer support, and scenic lakeside views await.
Pleasants Landing Triathlon at Lake Anna offers Olympic and Sprint courses, plus relay and aquabike options. Spectator friendly open water starts, rolling bike roads and a scenic run along the South Anna River.
Join the Cedar Creek Fall Duathlon on October 10, 2026 at Cedar Creek Park in Seaford, NY. Sprint 1.1 mile run, 11 mile bike and 1.1 mile run with individual, relay, family, high school and virtual entries.
Race through autumn colors at the Fall Foliage Adventure Race in Williamsburg on Oct 10, 2026. Pick 5 or 24 hour solo or team entries and navigate paddling, biking and trekking legs with map and compass for points.
Monster Triathlon returns to Keller TX for its 21st edition with an indoor 300 m swim, a hilly 14.3 mile bike and a 3.1 mile run. USAT sanctioned and drawing 700 plus athletes, it features age groups plus Athena and Clydesdale divisions.
Race She Tris Sprint Triathlon in Chapel Hill on October 11 2026: a quick 250 yard swim, 9 mile bike and 2 mile run at UNC Wellness Center Meadowmont. Relay and virtual entries welcome for all levels.
Join the second annual Mudskipper SoCal at Silverwood Lake on October 11, 2026, a scenic swimrun offering 8.5 km and 15 km courses. Mix open water swims and trail runs for a quintessential SoCal adventure.
Join Rock N RollMan in Macon on Sunday, October 11, 2026 at Sandy Beach Recreation Area on Lake Tobesofkee for multisport action with Olympic, sprint, duathlon and relay options across swim, bike and run. Great for first timers and veteran triathlete..