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Probility Ann Arbor Marathon

Quick facts

Distance Marathon

Date 21 Mar 2021

About Probility Ann Arbor Marathon

Take to the scenic streets of Ann Arbor in late March for the Probility Ann Arbor Marathon, brought to you by Epic Races and Champions for Charity. With a variety of running events that appeal to all ages and abilities, you’ll find that the Probility Ann Arbor Marathon is your ideal early-spring race, whether you’re walking your first 5K or running your 50th marathon.

Set for its annual running here at the home of the University of Michigan, the Probility Ann Arbor Marathon, Half Marathon, 10K & 5K runs along a point-to-point course that starts and finishes on the UM campus and features views of the city’s downtown as well as stretches along the winding Huron River.

If you’re a college football fan, the starting line is likely to be quite familiar to you — it’s near the northwest corner of the University of Michigan Wolverines football stadium on Main Street, also known as the “Big House.”



  • 42.164708km

Half Marathon

  • 21.243288km


  • 4.988954km


  • 9.977908km

Marathon Relay

  • 42.195km


Aid Stations

There will be 10 aid stations (eight, two of which are passed twice) on the full/half marathon loop and 1 on the 10K/5K loop (the full marathon runners and 10K runners will pass by these aid stations again on their second loop).

Award Medals

All full marathon, half marathon, 10K, and 5K finishers receive a commemorative medal. Special awards are also presented to the 1st Overall Male and Female and to the top 5 finishers in each age division for the full marathon, half marathon, 10K, and 5K.

Maximum Time

The marathon course opens to vehicular traffic at 1:30 PM (6:00 hours from gun time). Those who have not yet reached the finish line will need to move to the sidewalks at this time. The timing clock official stops timing at 6:00 hours from gun time.


Parking will be available at Ann Arbor Pioneer High School, a short walk from the starting area, for $5 per vehicle. Free parking will also be available in downtown Ann Arbor parking garage, lots, and streets. There is no parking on Fourth or Fifth Street.


Each aid station will have water and Gatorade. There will be Gu energy gel at stations 6 and 8 on the full/half marathon course.


Shuttle buses will be running from the designated shuttle stop at William and Ashley, by Ann Arbor State Bank (right near the finish line; see our map in Course Maps) to Pioneer High School approximately every 20 minutes.


University of Michigan Stadium

Ann Arbor,us


Main Street, between Liberty and William Streets.

Ann Arbor,us


All distance events — marathon, half marathon, 10K, and 5K — start just outside one of Ann Arbor’s most memorable landmarks: the University of Michigan Stadium. From the Big House, participants run through the vibrant streets of downtown Ann Arbor, then wind their way through the panoramic University of Michigan campus. The marathon and half courses also encompass stretches along the Huron River and Gallup Park and through Nichols Arboretum before returning to campus and downtown. All races end with a spectacular finish right on Main Street.


If you’re a college football fan, the starting line is likely to be quite familiar to you — it’s near the northwest corner of the University of Michigan Wolverines football stadium on Main Street, also known as the “Big House.”

From there, the course for the full and half marathon share the same route for the first mile; shortly after the first mile, those running the half marathon turn right to head south on State Street, where they’ll run an out-and-back stretch south and then north again on State before turning right again onto University Avenue.

Those running the full skip the State Street turn and instead head east on University, and then join Geddes Avenue for a stretch that takes them past the Forest Hill Cemetery and Nichols Arboretum.

Runners in the half marathon head back along University through downtown Ann Arbor and then onto tree-lined Washtenaw Avenue, where they’ll run a long, out-and-back stretch (with some hills), which turns more residential the further away you get from downtown.

When Washtenaw nearly converges with Stadium Boulevard, the course reaches the turnaround point and heads back northwest, taking runners along the route they just ran all the way back into downtown Ann Arbor.

The next stretch of the race brings runners into the second half of the half marathon, along South University Avenue and then south on State Street, back through campus and then south toward the athletic stadiums and facilities.

Runners cross the finish line on Main Street, between Liberty and William Streets.

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.