Michigan
Michigan Triathlon Calendar 2025-2026
Monthly updates for Michigan
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Explore the best triathlons in Michigan for 2025-2026! Our updated list features 27 exciting races across the region. Find your next race in Michigan below and join the running community at these great events!
February 2026
Push your limits at the GVSU "LAST CHANCE" TRI on Feb 15, 2026 at the GVSU Recreation Center in Allendale, MI. This indoor, time based triathlon features timed swim, bike and run segments and can serve as a conference qualifier.
Take on winter trails at the Abominable Snow Tri, a sprint triathlon for runners, fat tire cyclists and cross country skiers at Cannonsburg Ski Area. Multiple race formats plus post race food and beer promise a chilly good time.
March 2026
Challenge yourself at the Gaylord All Outdoors Tri 45, a winter triathlon on March 7, 2026 at Forbush Corners featuring a 5 km skate ski, 10 km fat tire bike and 5 km snowy trail run across rolling hills. Enjoy post race snacks, chip timing and a cus..
May 2026
Shi Tri is a scenic run, paddle and bike triathlon along the Shiawassee River in downtown Owosso. Race solo or join a 2 to 3 person relay and help support the Friends of the Shiawassee River and community fitness.
The Bear Lake Triathlon in North Muskegon on May 24, 2026 invites swimmers, cyclists, and runners to choose Sprint or Olympic distances, solo or relay. Expect a friendly lakeside course, custom shirts, finisher medals, and on course support.
Tri Greenville at Baldwin Lake on May 30, 2026 features a sprint triathlon, sprint duathlon, relay teams, a kids tri and the Dougling Dash. Enjoy elevated views of swim, transition and the finish from the Fred Meijer Flat River Trail.
June 2026
Race scenic Island Lake State Recreation Area in southeast Michigan with triathlon, duathlon, aquabike and relay options. Enjoy open water practice swims and rolling wooded courses through forest and meadows.
Experience the Grand Rapids Triathlon in Ada, MI on June 7, 2026: a scenic two day riverside event with 21 race and relay options from super sprint to half. Beginner friendly and wetsuits permitted for comfortable swims.
M22 Challenge in Sleeping Bear Dunes is a scenic multi sport race with a 2.5 mile run, 17 mile bike and 2.5 mile paddle. Test yourself on dunes and lakeshore routes and soak up the friendly festival vibe in mid June.
Race the Motor City Triathlon at Belle Isle Park on June 21, 2026 for scenic Detroit River and skyline views. Distances from super sprint to Olympic plus relays welcome beginners and veteran multisport athletes.
Experience Tri Goddess Triathlon on June 27, 2026 at Portage Lake in Waterloo State Recreation Area, featuring sprint and super sprint triathlon, duathlon, aquabike, relays and open water practice swims. Finish strong and celebrate at a lively post r..
July 2026
Join the Ann Arbor Tri, Du and Aquabike at Halfmoon Lake on July 11, 2026, a USA Triathlon state championship event offering triathlon, duathlon, aquabike, relays and a timed 1 mile open water swim. Swim the lake, bike rolling country roads, run the..
Join Cereal City Triathlon and Duathlon in Battle Creek on July 18 for multiple distances, relays and virtual options. Enjoy a lakeside swim, scenic bike and run, a finisher medal and post race meal while supporting youth scholarships.
Join TriWalloon on July 18, 2026 at Legacy Marina in Walloon Lake for a charity sprint triathlon supporting Bridge Street Ministries. Swim the lake, bike scenic country roads and finish with a lakeside run in a community race.
Race lakeside at Camp Manitou Lin in Middleville with triathlon, duathlon, aquabike and swim options. Scenic beach swim, rolling roads and lakeshore run routes, limited entries and proceeds support myTEAM TRIUMPH.
Tri Millennium returns to Millennium Park July 24 and 25 2026 with Olympic and Sprint triathlon, duathlon, aquabike, relays and kids races. Calm swim waters and rolling bike roads make a scenic summer race supporting Bridge Street Ministries.
Dive into Detroit Triathlon on July 26, 2026, featuring Olympic, Sprint and Super Sprint courses that challenge swimmers, cyclists and runners of all levels. Register starting Jan 1 and visit detroittri.com for details and pricing.
August 2026
Race the Tamarac Tri at Fremont Lake Park on August 15, 2026, with solo and relay options. A sprint course features a 750 meter swim, a 12.4 mile bike and a 5K run through lake and town trails.
Take on the Chesaning Dry Tri or a scenic 5K on August 15, 2026 at Showboat Park in Chesaning, Michigan. Bike, run and paddle to the river finish or pick the 5K for a lively community race.
Take on Michigan Titanium in Grand Rapids on August 16, 2026, with races from swim only to relays and epic 140.6 and 70.3 mile triathlons. Choose solo, team or virtual options and challenge yourself on a scenic multisport course.