Name: Ann Arbor Tri, Du, & Aquabike
Start: 2026-07-11
End: 2026-07-11
Location: Gregory, Michigan

About the Event

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 — 2-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

wb_sunny 17.8° / 27.8°

Wind (km/h)

Humidity (%)

air 9.7 /

water_drop 70.4%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 17.7° / 27.7°

wb_sunny 17.8° / 27.8°

air 9.7 km/h

water_drop 70.4%

About Gregory

Gregory is an unincorporated community in Livingston County in the U.S. state of Michigan. The community is located within Unadilla Township. As an unincorporated community, Gregory has no legally defined boundaries or population statistics of its own but does have its own post office with the 48137 ZIP Code.