Michigan
Michigan Triathlon Calendar 2026-2027
Monthly updates for Michigan
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Explore the best triathlons in Michigan for 2026-2027! Our updated list features 21 exciting races across the region. Find your next race in Michigan below and join the running community at these great events!
August 2026
A sprint triathlon at Fremont Lake Park on August 15, 2026, featuring a 750 m swim, 12.4 mile bike, and 5K run, with a relay option and a 150 participant limit.
A community multisport event in Chesaning with a 15.85-mile bike-run-paddle Dry-Tri and a 5K run/walk, staged from Showboat Park with kayak drop-off at Parshallburg Park.
Michigan Titanium in Grand Rapids on August 16, 2026 features triathlon, duathlon, aquabike, relay and swim only races plus a virtual solo option, with distances from sprint up to the full 140.6 mile ultra triathlon.
Multiple triathlon, aquabike, and duathlon formats take place on August 16, 2026, in Mackinaw City with a swim under the Mackinac Bridge, a bike route to Wilderness State Park, and finishes in Fort Mackinac Park.
Team-based Olympic distance triathlon in Grand Rapids on August 16, 2026, with Captain and Angel roles, volunteer opportunities, and an Olympic course of 0.93 mile swim, 40K bike, and 10K run.
A short-course triathlon and duathlon series at Island Lake Recreation Area with swim waves, chip-timed age group awards, a club points championship, wetsuit and safety rules, and an annual memorial award that supports cancer research.
Barron Lake Triathlon in Niles, Michigan on August 22, 2026 features a 500 yard swim, 15 mile bike and 3.1 mile run for adults, a relay option, and separate timed and non timed kids triathlons with age specific rules.
September 2026
Experience a premier multi sport event at Belle Isle State Park in Detroit. Choose from triathlon duathlon and aquabike categories while enjoying views of the Detroit River and the city skyline.
Multisport event at John Collins Park in East Grand Rapids on September 6, 2025. Sprint distance options include a 750 meter swim, 20 km bike and 5 km run; duathlon, aquabike, relay and swim only formats are offered.
A sprint triathlon in Lake Orion with an open water swim, 12.4 mile mixed-terrain bike and a 5K trail run on September 13, 2026. Registration opens October 21, 2025 and entries are capped at 100 participants.
A community fundraising event at Oakdale Trails featuring timed mountain bike single-track races, a 5k cross-country run and ruck, youth races, vendors, and activities to support Friends of Oakdale Trails.
IRONMAN 70.3 Michigan in Frankfort, MI features a Betsie Bay swim, a bike on historic highway M22 through Benzie County and a two loop 13.1 mile run.
A multisport event at Stony Creek Metropark in Shelby Township, Michigan featuring Olympic, Sprint and Super Sprint triathlon formats, duathlon and aquabike races plus relay options. Registration opens November 27 2025.
A multisport event at Camp Manitou-lin in Middleville Michigan on September 20 2026 offering sprint and Olympic triathlon duathlon and aquabike formats plus relays and a month long virtual option.
A paddle, bike and run event in Bay City on September 20, 2026, offering two-person canoe team and relay options plus an individual kayak division, with paddle on the Kawkawlin River and bike and run courses nearby.
A community event at Brandenburg Park offering a 5K run or walk and an individual duathlon with a 5K run plus a 2 mile kayak on Sept 20, 2026.
October 2026
A multi-sport event in Eaton Rapids combining a 2 km kayak, 15 mile bike, and 5 km run that ends with a colored powder finish. Options include individual triathlon, three-person relays, and a 5K-only entry.
March 2027
Experience a unique winter challenge in Frederic, Michigan, featuring a skate ski, fat-tire bike ride, and trail run. Join as a solo athlete or a relay team for a memorable multisport adventure in the snow.
May 2027
Shi-Tri is a run, paddle and bike triathlon in Downtown Owosso along the Shiawassee River. Entrants may compete individually or as a 2 to 3 person relay and choose to race or take a recreational pace.
June 2027
Multisport race day at Island Lake State Recreation Area in Brighton, Michigan on June 5, 2027, offering Olympic and sprint triathlons, relays, aquabike, a duathlon, and timed practice swims. Swim in Kent Lake, bike rolling tree lined roads, and run..