Chicago Will Implement 2026 Marathon Street Closures
The city announced a multi-day schedule of road closures for the 26.2-mile race on October 11, 2026.
Updated on Oct. 4, 2026 in Running
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Chicago will begin implementing phased street closures on October 8, 2026, to prepare for the annual Bank of America Chicago Marathon. The course spans 26.2 miles through various neighborhoods before finishing at Grant Park.
Why it matters
The city mandates these rolling road closures to safely accommodate the thousands of runners participating in the marathon course. Managing traffic flow across the route is essential for public safety during the major event.
The marathon course spans 26.2 miles across the city, necessitating closures that begin at 4 a.m. on October 8. Streets are scheduled to reopen in rolling stages throughout race day, concluding by 6 p.m.
The players
Bank of America Chicago Marathon
This is one of the world's premier road races and a member of the Abbott World Marathon Majors series.
Grant Park
This large urban park serves as the central hub for the race, hosting the start and finish lines.
The details
Closures around Grant Park start on October 8, with additional restrictions beginning throughout the city on October 10. Race day on October 11 features two primary closure phases starting at 4 a.m. and 6 a.m., with streets reopening incrementally after participants pass.
Timeline
October 8, 2026: The first major wave of closures begins at 4 a.m.
October 10, 2026: Additional lakefront street closures go into effect.
October 11, 2026: Race day features rolling closures and street reopenings.
October 16, 2026: The closure of Balbo Drive ends.
Season Trajectory
The closure plan follows the standard operational pattern of the Bank of America Chicago Marathon. It maintains the event's status as a major logistical operation that temporarily alters transit across several key city neighborhoods.
Drivers throughout the city should expect significant travel delays and detours as roads are closed in stages starting October 8. Local residents along the 26.2-mile route must plan for restricted vehicle access until the final street reopenings by 6 p.m. on October 11.
The takeaway
Commuters should plan for significant traffic adjustments during the week of the race as major corridors are restricted. Checking updated city traffic maps in the days leading up to October 11 will help avoid gridlock.
Further reading
For more information on race logistics and course maps, visit Running.
Source note: This article includes information reported by Rolling Out.
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