Marathon • Half Marathon • Marathon Relay • Climate Week 10K • Climate Week 5K • Kids Races
15 Years of Running Tree Town
Run through the heart of Ann Arbor at the 15th running of the Trinity Health Probility Ann Arbor Marathon.
From downtown streets and the University of Michigan campus to the Huron River, Gallup Park, and Nichols Arboretum, this is a race that feels unmistakably Ann Arbor.
Whether you’re walking your first 5K, chasing a Boston qualifier, running with friends in the relay, or introducing your kids to their first finish line, there’s a place for you here.
Every Body. Every Pace. Every Race.
Choose Your Race
There’s more than one way to Run Tree Town.
Marathon
26.2 miles through downtown, campus, and some of Ann Arbor’s most beautiful natural areas.
Half Marathon
Experience the best of the Ann Arbor course in 13.1 miles.
Marathon Relay
Share the marathon experience with your team.
Climate Week 10K
Presented by the City of Ann Arbor.
Climate Week 5K
Presented by the University of Michigan.
Kids Races
A big-race experience for our littlest runners — with kids 10 and under racing free with a paid adult registration.
Run Tree Town
This isn’t just a race through Ann Arbor. It’s a race that shows you Ann Arbor.
Start in the heart of downtown before traveling through the University of Michigan campus and into some of the city’s signature green spaces.
Along the way, you’ll experience:
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Downtown Ann Arbor
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The University of Michigan campus
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The Huron River
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Gallup Park
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Nichols Arboretum
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A downtown finish surrounded by the energy of race day
The USATF-certified marathon course is a qualifying course for both the Boston Marathon and the TCS New York City Marathon.
Running Toward a Sustainable Future
Climate Week 5K & 10K presented by the University of Michigan and the city of Ann Arbor
The Climate Week races bring runners, walkers, the University of Michigan, and the City of Ann Arbor together around a shared goal: creating a healthier, more sustainable future for our community and our planet.
Whether you race the 5K, take on the 10K, or walk with friends and family, you’re part of something bigger than the miles.
Run local. Move together. Run toward a sustainable future.
Make a Weekend of It
Coming from out of town? Give yourself time to enjoy Tree Town.
Ann Arbor is filled with locally owned restaurants and cafés, independent bookstores, theaters, galleries, museums, parks, and plenty to explore before and after race day.
Grab dinner downtown. Walk through campus. Visit the University of Michigan Museum of Art. Celebrate your finish with family and friends.
There’s a reason people love coming back to Ann Arbor.
START LINE: 209 S Ashley St
15 Years of Running Ann Arbor
For 15 years, runners and walkers have gathered in downtown Ann Arbor to challenge themselves, celebrate together, and experience this community on foot.
Some come to qualify.
Some come to finish their first race.
Some come back year after year.
Whatever brings you to the start line, we’d love to have you be part of year 15.
Run Tree Town.
Remembering Mike Highfield
1947–2026
The Ann Arbor Marathon family is saddened by the passing of race founder Mike Highfield, who died July 22, 2026, at age 78.
Mike and his wife, Andrea, created the Ann Arbor Marathon along with other charitable running events in the community, including Big House Big Heart. Their vision was to give Ann Arbor a race its community could be proud of.
Every athlete who crosses our start line is part of something that began with Mike’s idea.
Running was a lifelong passion for Mike. He began running seriously in the 1970s and completed 31 marathons, including 12 Boston Marathons. He later became an accomplished triathlete and a national leader in the sport, serving as President of USA Triathlon and helping assemble America’s first Olympic triathlon team for the Sydney 2000 Games.
Mike was also a University of Michigan graduate, an Ann Arbor attorney for 40 years, and a devoted Wolverine fan.
We are grateful for the foundation Mike built and for the legacy he leaves behind.
The 2026 Trinity Health Probility Ann Arbor Marathon will be run in Mike’s memory, with a moment of silence held before the start.
Our thoughts are with Andrea, his children and stepchildren, his grandchildren, and everyone who loved him.
Mike’s family has requested that memorial donations be made to the Tunnel to Towers Foundation at T2T.org.
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