- Weather
- 46°Ftypical startModelled estimate
- Field size
- ~1,000 runners
- Course
- Rolling
- Elevation
- 600 ft gain · 0 ft net
Event listed as: Marathon
PR7Weather9Experience7
Early October · Midwest · Double Loop
Trinity Health Probility Ann Arbor Marathon
Ann Arbor, MI · Saturday, October 3, 2026
Event: Marathon (26.2)
Registration opens on the organizer's site
Typical start
47°
Cooler than 58% of U.S. marathons
Modeled historical conditions
Elevation gain
700ft
Flatter than 20% of races
Estimated total climb
Field size
800
Larger than 31% of races
Estimated field
PR potential
7.3/10
Ahead of 37% of races
Almanac model
Percentiles compare this race against all 224 U.S. marathons in the Almanac.
Course profile
700 ft gain · 0 ft net
Rolling course, double loop.
0510152026.2
Race-day weather
Modeled from location, month and coastal proximity, not verified race history.
6 AM
39°
Start
47°
Midday
58°
ExcellentGoodWarmHeat risk
Typical start sits at 47°F, excellent marathon conditions.
Typical dew point 40°F, 22% chance of precipitation, wind around 7 mph. All modeled.
The bottom line
A small race that trades atmosphere for room to run.
Trinity Health Probility Ann Arbor Marathon is a strong choice for a first marathon, and the course rolls gently without any sustained climbing. The tradeoff is atmosphere: expect long quiet stretches and few spectators.
Why runners choose this race
A loop course around Ann Arbor, MI, with steady rollers that reward even pacing.
The case for it
- Runners who want a low-key start
The tradeoffs
- You want crowds and on-course energy
Course and logistics
- Course type
- Double Loop
- Surface
- Road
- Profile
- Rolling
- Total gain
- 700 ft(estimated)
- Total loss
- 700 ft(estimated)
- Net elevation
- 0 ft(estimated)
- Field size
- ~800 runners(estimated)
- Crowd support
- Quiet, low-key
- Entry
- Easy
- Entry fee
- $100(most recent listed price)
- Day of week
- Saturday
- Start / finish
- Start and finish in the same area
Race details
- Typical timing
- Early October
- Next confirmed date
- Saturday, October 3, 2026
- Registration
- Open now
- Region
- Midwest
- Editorial tier
- Recommended
- Data last reviewed
- 2026-08-26
- Loop course
- Easy entry
Similar races
Races with a comparable profile.
- Weather
- 47°Ftypical startModelled estimate
- Field size
- ~1,200 runners
- Course
- Rolling
- Elevation
- 600 ft gain
Gateway Arch Riverfront
PR7Weather9Experience7
- Weather
- 47°Ftypical startModelled estimate
- Field size
- ~1,200 runners
- Course
- Rolling
- Elevation
- 600 ft gain · 0 ft net
Event listed as: Marathon
PR7Weather9Experience7