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Trinity Health Probility Ann Arbor Marathon

Sunday, October 4, 2026
Ann Arbor, Michigan

Thank you for your patience and understanding as this annual event raises money for local charities while helping thousands of 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 or impacted from 3 a.m. - 1 p.m. but will reopen as the last runner passes through. 

S. Ashley from W. Washington to W. Madison

W. Madison from S. Ashley to S. State

S. 5th from W. Madison to Hill

State from W. Madison 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.

Observatory to Geddes

Geddes to Huron Parkway

Fuller Rd. sidewalk to E. Medical Center Dr. sidewalk to Arb entrance at Ronald McDonald House

Washington Heights between E. Medical Center Drive and Observatory

Riverview Dr. from bottom Arboretum exit to Geddes Road.

Closed 7 a.m. – 1pm
Observatory from CCRB Bridge exit to Geddes
Geddes from Observatory to Huron Parkway (only eastbound lane open)
Washington Heights to Observatory

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Interested in Learning More?

We will contact you with more information about our event.