The Chicago Marathon is a large annual road race held in the city of Chicago, Illinois, typically occurring on the first or second Sunday of October. The event hosts approximately 40,000 runners, making it one of the largest marathons globally.\n\nThe course forms a loop through downtown Chicago and many neighborhoods, covering a standard marathon distance of 42.195 kilometers (26.22 miles). The route is characterized by minimal elevation changes, with a total elevation gain of about 243 feet (7
Adjusted Time
3:54:33
Time difference: -5.4 minutes compared to a flat, road, temperate course.
| Surface | Road |
| Elevation Gain | 75m |
| Elevation High | 193m |
| Elevation Low | 176m |
| Predicted High | 18°C |
| Predicted Low | 11°C |
| Chance of Rain | 0% |