United States
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Alabama9
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Alaska7
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Arizona11
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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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Florida45
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Georgia13
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Hawaii1
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Idaho9
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Illinois15
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Indiana19
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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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Minnesota15
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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 Carolina29
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North Dakota
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Ohio12
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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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Utah12
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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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Wisconsin22
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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 622 exciting races across the country. Find your next race in the United States below and join the running community at these great events!
December 2025
Raid the Rock is a multi sport adventure in Central Arkansas on Dec 20-21, 2025, blending trekking, mountain biking and paddling with map and compass navigation. Choose 8 hour or 24 hour courses solo or with a team for an epic winter challenge near L..
Join the inaugural Dirty Santa Beer Mile at 5x5 Brewery on December 20 for five laps around the brewery with a beer before each lap. Open to ages 21 to 99, finishers get a medal, shirts for early registrants and awards for top finishers.
Embrace winter trails with the Stick Season Trail Run Series in Glencoe, Missouri. Five Saturday races from late December to late January cover 4 miles to a half marathon on mixed single track and road, with chip timing, great swag and series awards.
Celebrate New Year Eve with the Corpus Christi Triathlon Club on December 31, 2025 in Corpus Christi, TX, welcoming athletes of all ages and abilities. Join training, relays, and community racing with results shared via Twitter.
January 2026
Start the year at the New Year's Duathlon and 5K at Granite Beach, Folsom Lake, with scenic lake trails and a 2 mile run 5 mile bike 2 mile run or a gentle 5K. Enjoy aid stations, post race soup and cookies and support a local charity.
Join the Winter Warm Up Adventure Race, a 5 Hour January 2026 event at Gambrill State Park with mountain biking and a trek only option. Compete solo or with a team of two, three or four for a spirited outdoor challenge.
Beginner friendly off road duathlon at Laurel Hill County Park in Mount Pleasant, SC on January 10, 2026. Enjoy scenic trails with a 2 mile run, 7 mile bike and 2 mile run.
Support Cape Fear Youth Triathlon Team at the Cape Fear Indoor Triathlon on Jan 11 2026, a fun one hour indoor swim bike run challenge. In person waves and a virtual option let you compete your way with 100% of proceeds donated.
Take on the 2026 Tri Flake Winter Triathlon in Anchorage at Kincaid Park for a thrilling snow event featuring run, snow bike and ski legs. Solo and team entries welcome, with a festive stadium finish and courses set by race day conditions.
Take on the Chill Winter Adventure Race in Cumberland Jan 24 2026 for a rugged day of winter trekking, biking and navigation around Bear Creek Lake. Solo racers or teams of 2 to 4 welcome as strategy and route choice shape the challenge.
Take on the OSU Indoor Triathlon at RPAC on Jan 25, 2026, a USAT Collegiate Nationals qualifier with indoor swim, stationary bike and track run. Postrace food and race shirts for early registrants make for a fun campus event.
Hit the snow at the Mora Winter Triathlon and Duathlon at Vasaloppet in Mora, MN on Jan 25, 2026 for running, fat biking, and skiing across scenic nordic trails. Solo racers and team relays welcome.
Join the Ninth Annual Laguna Vista Du It By The Bay Duathlon on Sunday, January 25, 2026 at Roloff Park in Port Isabel, Texas. Run, bike, run solo or team up in a relay for a scenic, community focused coastal challenge.
Come to the NorthPointe Wellness Indoor Triathlon Series in Roscoe from Jan 31 to Mar 21, 2026 for three indoor swim, stationary bike and treadmill run events. Enter single races or the whole series for medals and fun.
February 2026
Dive into winter at the St. Charles Indoor Triathlon, Feb 1, 2026 at Norris Rec Center, with adult and youth divisions offering a lively indoor multisport challenge. Proceeds benefit St. Charles Aquatics and Multisport Madness youth team.
Take on a two run, one bike duathlon at Lake Louisa State Park with a 2 mile run 12 mile bike 2 mile run or a shorter super sprint option. Field is limited to 130, all get a souvenir and the top 15 men and top 15 women earn a Super Bowl Du shirt.