Indiana
Indiana Triathlon Calendar 2025-2026
Monthly updates for Indiana
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Explore the best triathlons in Indiana for 2025-2026! Our updated list features 21 exciting races across the region. Find your next race in Indiana below and join the running community at these great events!
May 2026
Mission is a multi discipline adventure race on May 2, 2026, with an epic 18 hour main course or a shorter four hour Lite option for teams or qualified solo racers. Expect navigation, cycling, trekking and paddling plus live tracking for spectators.
Thunder in the Valley in Terre Haute invites triathletes and duathletes to race a scenic swim in Hawthorn Lake, rolling bike loops and a shaded 5k run. Sprint, duathlon and relay options make it ideal for solo racers or teams seeking a fast, fun spri..
Race the USAT State Championship at Prairie Creek Reservoir Park on May 17, 2026 with Sprint and Olympic triathlons plus duathlon, aquabike and relays for all levels. Beach starts, scenic bike rollers and a custom finisher medal await.
Challenge yourself at the Fox Island Sprint Triathlon May 23 2026 at Bowman Lake with a 500 yard swim, 12 mile bike and 3.1 mile run. Pick individual, relay, duathlon or aquabike and enjoy chip timing, shirts and finisher medals.
June 2026
America's Race Leon's Triathlon in Hammond, Indiana June 6 to 7, 2026 offers sprint and Olympic races, relays, a paratriathlon qualifier and a kids Splash and Dash. The race honors Military, Veterans and First Responders, welcoming all levels.
Jump into the Clear Lake Triathlon on June 6, 2026 at Clear Lake Beach and Pub in Fremont Indiana, offering sprint and Olympic distances plus duathlon options. USAT sanctioned event with chip timing, shirts, medals and age group awards.
Kick off the Mudskipper US Swimrun season at scenic Deam Lake with swimrun and trail options for all levels. Choose from short and classic swimrun loops or a 5 km trail run for a fun, outdoorsy race day.
Join the Indiana Sports Corp Corporate Challenge at Indianapolis Motor Speedway on June 26 and 27 for a lively two day team festival. Try running, cycling, pickleball, cornhole, yoga and more, and enjoy team tents, lunch and wellness activities.
Join the Ideal Beach Triathlon in Elkhart on June 27, 2026, featuring sprint and kids courses for beginners and experienced racers. Team relay options and a Heart of a Warrior award make this a welcoming event for all.
Join the 33rd annual Warsaw Optimist Triathlon on June 27, 2026 at Winona Lake Park for swim, bike and run action, plus duathlon, aquabike, relays, youth divisions and an adaptive My Team Triumph category. All ages and abilities welcome.
July 2026
IRONMAN 70.3 Muncie is North America's longest running 70.3 and an early qualifier for the 2027 World Championship. Swim Prairie Creek Reservoir, bike fast country roads and run rolling trails through Muncie Nature Park.
Join the La Porte Triathlon on July 11, 2026 in La Porte Indiana for a friendly sprint distance race capped at 300 athletes. Now part of the Tris4Health family, the event adds an aquabike category and welcomes team relays.
Race the Huntington Sprint, Olympic or Half Iron at scenic Lake Clare with a lake swim and fast, flat bike and run courses. USAT sanctioned with duathlon, aquabike and 2 or 3 person relays, the event includes chip timing, medals and a festive lakesid..
August 2026
Dive into the DINO Gravel Triathlon on August 1, 2026 at Griffin Bike Park in Terre Haute. Swim or paddle, ride a scenic gravel course and finish on trails; race solo or as a relay and camp nearby for the full experience.
Join the Lake Max Triathlon and Duathlon at Culver Academies in August for adult triathlon and duathlon events, team relays and kids races. Scenic campus courses, plus post race food, music and a beer garden for racers and families.
Dive into the 11th annual Rock the Quarry Triathlon and Mile Swim at Fidler Pond Park in Goshen Indiana on August 8, 2026. Choose a sprint tri or chip timed mile swim in a scenic former rock quarry with fast flat bike and run courses.
Race the Fox Island Triathlon on August 15, 2026 at Fox Island County Park with a swim in Bowman Lake, flat bike roads and a scenic park trail run. USAT sanctioned and chip timed, all finishers get a medal and racers get a race shirt.
Race the Geist Waterfront Triathlon in Fishers at Geist Waterfront Park with sprint and Olympic distances plus duathlon, aquabike, and two and three person relays. USAT sanctioned and chip timed on a scenic waterfront course with shirts and medals.
September 2026
Take on the Mighty Mississinewa Triathlon at Miami State Recreation Area in Peru Indiana on September 12, 2026. Choose from sprint to Half Iron distances, relays and aquabike, enjoy scenic reservoir swims, chip timing, a race shirt and a finisher med..
Take on land and lake at the Mudskipper US Swimrun Championships Indiana II in Borden on 27 Sep 2026. Distances range from quick 3 mile swims to the full 23.6 km challenge, so beginners and seasoned racers both find a fit.