Race Day
Road Closures
Thank you for your patience and understanding as this annual event raises money for local charities while helping more than 2,500 people from around the world achieve personal health and fitness goals. Roads will likely begin to open earlier than posted times as long as it is deemed safe for both the drivers and runners!
The roads below have the potential to be closed from 3 a.m. - 1 p.m. but will reopen as the last runner passes through.
S. Ashley from W. Washington to W. Liberty
Liberty from S. Ashley to State
State from E. Liberty to S. University
South University from State to East University
Observatory from Geddes to Washington Heights
East U across Pedestrian Mall to North U.- cross North U.
Palmer Field path to Observatory
Observatory to Geddes
Geddes to E. Huron River Dr.
E. Huron River Dr. to N. Dixboro
N. Dixboro to Geddes Rd.
Geddes Rd. to Fuller Rd. where runners will move to sidewalk (traffic will be stopped intermittently to let runners cross the road)
Fuller Rd. Sidewalk to Fuller Ct. Sidewalk toward westbound Fuller Rd. sidewalk (traffic will be stopped intermittently to let runners cross the road)
Fuller Rd. sidewalk to E. Medical Center Dr. sidewalk to Arb entrance
Arb trails to Washington Heights
Closed 7 a.m. – noon
Observatory from CCRB Bridge exit to Geddes
Geddes from Observatory to Huron Parkway (only eastbound lane open)
Huron Parkway to East Huron River Drive (the eastern/northbound lane only)
East Huron River Drive from Huron Parkway to Dixboro (eastbound lane open)
Dixboro Road to Old Dixboro Road
Washington Heights to Observatory
Parking
CLICK MAP TO ENLARGE
Gear Check
On race morning, you may check a supplied clear plastic gear bag at the designated Gear Check area located in the 1st & Huron Parking Lot (enter from Ashley & Washington). This area is one block north of the start/finish line.
Drop-Off Hours
7:00 a.m. – 9:00 a.m.
Pick-Up Hours
9:30 a.m. – 2:00 p.m.
Gear Check Bag Details
- Pick up your bag and label at the expo or at the Gear Check area on race day.
- Bag size: 16” × 20” with a gusseted bottom.
- Affix your label before handing the bag to race personnel.
- Items that do not fit inside the official bag will NOT be accepted.
Important Reminders
- Cinch and tie the drawstrings so your belongings don’t fall out.
- Do not check valuables.
- We will do our best to safeguard bags, but we are not responsible for lost items and/or gear check bags.
Fluids, Foods & On-Course Amenities
Your safety and performance are our top priority. Please take fluids, fuel, and amenities only from official aid stations along the course.
- Water: Absopure Spring Water available every 1.5 miles
- Sports Drink: Gatorade® Endurance Formula™ (exclusive race sports drink), Lemon-Lime flavor at every official station
- Energy Gels: GU Gels at mile 6.5 and mile 19.5
- Portable Toilets: Located at every aid station
Eco-Friendly Service
- Fluids will be served in compostable cups.
- Tables will be set up on both sides of the course.
- To avoid congestion at the first table, head to a later one—then keep moving once you’ve grabbed your drink!
Mile Markers, Clocks & Timing
- Mile Markers: Clearly posted at every mile
- Course Clocks: Synchronized to the start of Wave 1
- Timing Mats: Strategically placed for accurate splits and results
Zero Waste Event
♻️ A Leave No Trace Event
At Epic Races, sustainability is a core part of how we operate. Instead of traditional trash cans, you’ll find a centralized Zero Waste Station known as “Ground Zero.” Powered by our friends at Happy Planet Running and our rockstar volunteers, this is where every wrapper, cup, plate, and crumb goes to live its best recycled, composted, or reused life!
Please bring all of your trash to Ground Zero. Our Green Team will sort, weigh, and record everything to produce our post-event Sustainability Report. Your participation helps us reduce our environmental footprint and keep our venue beautiful.
See our sustainability reports here:
2025 Probillity Ann Arbor Marathon Sustainability Report
2024 Probility Ann Arbor Marathon Sustainability Report
Past Probility Ann Arbor Marathon Sustainability Reports
Interested in getting involved?
Join our Epic Green Team by signing up here: Become a Green Team Volunteer .
