Michigan · Marathon · Half Marathon · 10K
Trinity Health Probility Ann Arbor Marathon
Trinity Health Probility Ann Arbor Marathon is a marathon, half marathon, 10K, 5K and Marathon Relay event held in Ann Arbor, Michigan. Its next confirmed date is Sunday, October 3, 2027. About 3,000 runners take part across all distances.
- Race day
- October 3, 2027
- Location
- Ann Arbor, MI
- Field size
- ~3,000 runners
Race details
- Date
- Sunday, October 3, 2027
- Location
- Ann Arbor, Michigan
- Distances
- Marathon, Half Marathon, 10K, 5K, Marathon Relay, Half-Marathon Walk
- Field size
- About 3,000 runners
- Course
- Rolling course through downtown Ann Arbor, U-M campus, and along the Huron River; moderate hills
- Registration
- runsignup.com
- Official website
- annarbormarathon.com
Registration, course & weather
- Registration status
- Registration status as last checked October 7, 2026: opens soon
- Start time
- 8:00 AM EDT
- Course profile — Marathon
- Loop course; Road surface; USATF certified; Boston qualifier
- Course profile — Half Marathon
- Loop course; Road surface
- Typical race-day weather
- about 46°F at the start, 97% humidity, 7 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked October 2, 2026)
About the Trinity Health Probility Ann Arbor Marathon
A scenic multi-distance race weekend starting in view of Michigan Stadium that loops through downtown Ann Arbor, the U-M campus, Gallup Park, and Nichols Arboretum.
Rankings and notes
- Rankings and awards
- USATF-certified; Boston and New York Marathon qualifier; one of Southeast Michigan's largest multi-distance race weekends
More marathons in Michigan
Coming up next, by confirmed date.
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Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Trinity Health Probility Ann Arbor Marathon: common questions
- When is the Trinity Health Probility Ann Arbor Marathon?
- The next confirmed date is Sunday, October 3, 2027.
- Where is the Trinity Health Probility Ann Arbor Marathon held?
- In Ann Arbor, Michigan.
- What distances does the Trinity Health Probility Ann Arbor Marathon offer?
- Marathon, Half Marathon, 10K, 5K, Marathon Relay and Half-Marathon Walk.
- How many people run the Trinity Health Probility Ann Arbor Marathon?
- About 3,000 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Trinity Health Probility Ann Arbor Marathon?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Trinity Health Probility Ann Arbor Marathon?
- Registration status as last checked October 7, 2026: opens soon. Listed fee for the longest distance, $82.50 (from runsignup.com, checked October 7, 2026).
- What time does the Trinity Health Probility Ann Arbor Marathon start?
- 8:00 AM EDT.
- What is race-day weather usually like at the Trinity Health Probility Ann Arbor Marathon?
- about 46°F at the start, 97% humidity, 7 mph wind (based on the 2025 race day, measured near the city center rather than the exact start line; Open-Meteo, checked October 2, 2026).
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.