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!
October 2026
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.
Nat Greene’s Revenge at Lake Brandt Marina in Greensboro features a morning road triathlon and duathlon and an afternoon off road triathlon, plus the option to race both for the Double Trouble Award. Come for fast courses and a lively multisport fest..
OTILLO Swimrun Colorado on October 4 invites teams to combine open water swims at Horsetooth Reservoir with scenic trail runs in Lory State Park. Multiple distances for all levels, with mandatory race gear and packet pickup the day before.
Take on Playtri Fort Worth at Marine Creek with sprint and Olympic triathlon and a duathlon, plus relay and virtual options for all levels. Finishers earn medals and those who complete both spring and fall races receive a Double Finisher Medal.
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 brings Olympic and Sprint triathlon action to the scenic shores of Montauk for individuals and teams. Options include AquaBike, BikeRun, relays and a high school division, with free event photos posted afterward.
Test yourself at the Mattoon Last Chance Tri at the Mattoon Area Family YMCA with a 275 yard indoor swim, 12 mile bike and 3.1 mile run. Register by September 12, 2025 for a tech shirt and race solo or on a team.
Triathlon at Lake Lemon on October 4 2026 offering Sprint and Olympic distances plus duathlon aquabike and relay options. Swim is in Lake Lemon and bike and run courses use local foothills and park roads.
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.
Race at Pleasants Landing Marina on Lake Anna with Olympic and Sprint options, aquabike and relays for athletes 12 and older. Finishers get timed results, a medal, tech shirt and a post race meal in a scenic marina setting.
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.
Explore autumn woods and waterways at the Fall Foliage Adventure Race in Williamsburg VA. Choose 5 hour or 24 hour solo and team formats combining paddling, biking, trekking and map navigation through parks and historic sites.
Take on lakefront courses at TVA Melton Hill Dam with sprint, Olympic, Half Iron and relay options for every level. Enjoy scenic swims, rolling bike routes and a finish by the water with race day registration available.
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.
Take on the Rock N RollMan Race Series in Macon on Oct 11, 2026, with Olympic, Sprint, Duathlon and Aquabike races at scenic Lake Tobesofkee. Relays welcome and courses suit beginners to seasoned multisport athletes.
Join the Game On! Saint Augustine Triathlon at Vilano Beach for Olympic and Sprint distances, plus duathlon, aquabike and relays. Swim the Atlantic, bike A1A with coastal reserve views and run along the scenic nature boardwalk.
Swim the Gulf and bike Highway 87 at the Latitude Fall Triathlon on Oct 11 at Fort Travis Park in Port Bolivar. Limited to 200 athletes, this USAT sanctioned race offers protected Gulf swims and a scenic run with gulf views.
Join the AdventHealth Great Floridian Multisport Festival in Clermont for a weekend of triathlon, duathlon, aquabike, relays plus 5K and 15K runs and virtual options. Celebrate the festival's 36th year with exciting new triple distance events.