Course
The marathon course is a loop course, starting and ending at Grant Park. From here, the current course winds through 29 of the city's neighborhoods. The course loop can be generally divided into three sections: North, West, and South. Near each of these directions, three of the city's main stadiums are nearby at their turning points. Wrigley Field is near the north. The United Center is to the west. US Cellular Field is to the south. On the other hand, Soldier Field is located near the start/finish area.
For the first three miles, runners wind through Chicago's downtown area. Eventually, they head north along LaSalle Street.
Runners are supported by 20 aid stations. Each are spread about 1–3 miles from each other. In addition, medical staff is available at each of the stations, and ambulatory services are in scattered throughout the course.
Digital timers are positioned at every 5 kilometers, as well as the halfway point.
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