On July 11, 2026, the Ann Arbor Tri, Du, & Aquabike takes place at Halfmoon Lake Day Use Facility in the Pinckney Recreation Area near Gregory, Michigan. The event offers multiple formats including triathlon, duathlon, aquabike, and swimming disciplines. The featured distance is 1 mile. Entry fees range from $50 to $340 depending on the event format selected. Racing begins at 7:30 AM, giving competitors an early start to their day. The venue's lakeside location provides access to natural water for the swimming and aquabike components while supporting the running and cycling segments of the various race formats offered.
From the Race Organizer
Since 1986, the iconic and classic Ann Arbor Tri has been held in the Pinckney Recreation Area at Halfmoon Lake, one of the largest state parks in all of Michigan. You’ll swim the open waters of Halfmoon, bike the rolling paved country roads of the surrounding rural area, and then run the Potowatomi Trail. It’s a classic course you’ll come back to again and again. Choose Your Challenge! Olympic Triathlon — 1500 meter swim (64 lengths in a standard metric pool), 28-mile paved road bike, 5.3-mile trail run (Yes, it's really an Olympic: ( USAT Distances Defined ) Sprint Triathlon — 750-meter swim (32 lengths in a standard metric pool),14-mile paved road bike, 3.5 mile trail run Olympic Aquabike (swim bike done) — 1500 meter swim, 28-mile paved road bike Sprint Duathlon — 1.5-mile paved run, 14-mile paved road bike, 3.5 mile trail run Olympic Relay — team up with one or two friends to complete our Olympic Triathlon together Sprint Relay — team up with one or two friends to complete our Sprint Triathlon together Park Entry A State Park permit or Recreation Passport is needed to enter Pinckney Recreation Area. Visit the Michigan Department of Natural Resources here for pricing and more information. Host Club The Ann Arbor Tri Club and the University of Michigan Tri Team will be your host clubs for this event. We are grateful to them for providing volunteers and bringing sharing their passion, dedication, and spirit to the Ann Arbor Tri! To learn more about Ann Arbor Tri Club, CLICK HERE . To learn more about The University of Michigan Tri Team CLICK HERE . To learn more about our club sponsorship program, CLICK HERE . Course Please note that in the interest of safety, all courses are subject to change at any time at the discretion of the race director. 750m Swim Course Map (2x for Oly) Duathlon 1st Leg Sprint Bike Course Map Olympic Bike Course Map Sprint and Mini Run Course Olympic Run Course USA Triathlon Distance Defined Start Times While start times are noted in the event information, all start times are subject to change. All participants must be at the mandatory race meeting on the beach at 7:15 AM and ready to race by 7:30 AM. An official race schedule will be sent in the pre-race information. Post-Race Party Stick around post race for food and festivities! Our Epic staff and volunteers will be cooking up pancakes, breakfast burritos, and more for race participants. Zero Waste The event is a Leave No Trace event. Learn more about our race-day recycling and composting efforts here. Want more information about running a great race and leaving no trace? Click here to visit Happy Planet Running! → Read the 2023 Ann Arbor Tri sustainability report here!
Hotels Near This Race
Find accommodation close to the start line in Gregory, MI. Sorted by distance from the race venue. Book early — race weekend hotels fill fast.
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Race Travel Insurance
Don't forget travel insurance for July 10.
You've trained for months and booked a trip to Gregory, MI.
A pre-race injury, a delayed flight, or a family emergency can derail the whole thing.
Travel insurance can help cover your race entry fee, hotel, and flights if you can't make it,
and may cover medical costs if something goes wrong on the course. Plans typically only run
5-7% of your total trip cost — and running events are covered under standard plans with no
additional coverage needed.
Trip cancellation up to 100% of prepaid costs
Running events covered under standard plans — no add-ons needed
Trip interruption up to 150% of non-refundable costs
When is Ann Arbor Tri, Du, & Aquabike 2027 — Gregory, MI?
Ann Arbor Tri, Du, & Aquabike 2027 — Gregory, MI takes place on July 10, 2027. The race is held in Gregory, Michigan.
Where is Ann Arbor Tri, Du, & Aquabike 2027 — Gregory, MI held?
Ann Arbor Tri, Du, & Aquabike 2027 — Gregory, MI is held at Halfmoon Lake Day Use Facility, Pinckney Recreation Area in Gregory, Michigan.
Where can I find hotels near Ann Arbor Tri, Du, & Aquabike 2027 — Gregory, MI?
RaceHotelFinder shows hotels sorted by distance from the race venue in Gregory. Use the map or list view on this page to compare options and book race weekend accommodation.
