Platinum
Chicago Marathon
Chicago · Oct 11, 2026
The flattest course among all Majors, with 120,000 people competing for 45,000 spots. Running through Chicago's 29 vibrant, multicultural neighborhoods reveals the city's diverse character. The most PB-friendly Major, while simultaneously offering an authentic Chicago neighborhood experience.
Date
Oct 11, 2026
Difficulty
Moderate
Elevation
~37m elevation gain
Field Size
45,000 runners
Course
Through 29 distinctive neighborhoods, starting at Lake Michigan, nearly flat throughout
Tips
- •October Chicago weather can be cool — bring a windbreaker and gloves
- •Second half of course exposed to lakefront winds — may impact pace
- •Stay near Grant Park or Loop — walkable to start line
- •Post-race: Millennium Park, Cloud Gate ('The Bean'), Michigan Avenue shopping
World MajorFlattest CoursePB FriendlyFall Season