2025 - Trinity Health Probility Ann Arbor Marathon: 5K • 10K • Half-Marathon • Full Marathon • Marathon Relay • Half-Marathon Walk
2025 distances
Running
Kids Run Half Mile - 10 and under only
Bring the kiddos along to packet pickup up at the marathon expo on Saturday, October 11th and sign them up for the Kids Run .262 or Half Mile races, starting at 11am.
Kids Run .262 - 8 and under only
Bring the kiddos along to packet pickup up at the marathon expo on Saturday, October 11th and sign them up for the Kids Run .262 or Half Mile races, starting at 11am.
Marathon (26.2)
Early Start Option: Marathon (26.2)
Plan on taking more than 6 hours to finish? Choose our early start option when you register! Please note that packet pickup opens at 6 a.m. which is the same time as the early start option. This means that you will need to pick up your packet at the expo the day before the race. We will record your start time as 6 a.m. You will need to have a headlamp and any hydration that you will need before 8:00 a.m when the course officially opens. Remember that the course will be marked, but there will not be any police or volunteers on the course until 7:30 a.m. so you will need to follow traffic laws and it will be good to be familiar with the course. The course will close promptly at 2 p.m. At that time, if you are still on the course, you will need to move to the sidewalks. You, of course, may finish the race, but the finish area will begin cleaning up.
Marathon Relay (Women, Men, Mixed, 50+)
Half Marathon (13.1)
10K
5K
Virtual Marathon
Not able to make it to Ann Arbor on race day? Hold your own Probility Ann Arbor Marathon at the time and place of your choosing!
Virtual Half Marathon
Not able to make it to Ann Arbor on race day? Hold your own Probility Ann Arbor Half-Marathon at the time and place of your choosing!
Virtual 10K
Not able to make it to Ann Arbor on race day? Hold your own Probility Ann Arbor 10K at the time and place of your choosing!
Virtual 5K
Not able to make it to Ann Arbor on race day? Hold your own Probility Ann Arbor 5K at the time and place of your choosing!
Epic Pace Team - Marathon BY INVITATION ONLY
Epic Pace Team - Half-Marathon BY INVITATION ONLY
Epic Pace Team - 10K - BY INVITATION ONLY
Epic Pace Team - 5K - BY INVITATION ONLY
Walking
Half-Marathon (13.1) Walk
13.1-mile walk. This event is for walkers only, no runners! All participants will receive a time and a place, but no awards. You will need to be able to maintain a 30-minute-per-mile pace.
Race-day weather
Conditions on October 11, 2025 — historical Open-Meteo data.
The sun rises at 7:43 AM and sets at 6:59 PM local time (EDT) in Ann Arbor on October 11, 2025 — 11h 15m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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2025 results — Trinity Health Probility Ann Arbor Marathon: 5K • 10K • Half-Marathon • Full Marathon • Marathon Relay • Half-Marathon Walk
812 finishers across 2 distances · leading places in the Virtual Half Marathon
| Place | Name | Time | Pace |
|---|---|---|---|
| 1 | Emily Kriebel | 2:33:09 | 11:41 /mi |
| 2 | Mary Humphries | 4:07:00 | 18:51 /mi |
Every finisher is on the results page, filterable by distance, gender and age group.
Other races near Ann Arbor
Different organizers, within 40 miles, in the next three months
Trinity Health Probility Ann Arbor Marathon: 5K • 10K • Half-Marathon • Full Marathon • Marathon Relay • Half-Marathon Walk
Turner's Trot Annual 5K Walk/Run
The Rat Race 5k Run/Walk
UM Swe Engineered to Run Charity 5k
🏃 Plan Your Next Race in Ann Arbor
Find upcoming events by distance:
- Ann Arbor 5K Races 27 races
- 10K Run Events in Ann Arbor 11 races
- Ann Arbor Half Marathons 6 races
- Ann Arbor Running Calendar 2026 37 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 37 Ann Arbor events
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