October 11, 2026 · Chicago, Illinois, USA
26.2 mi (42.2 km)RunningMarathon
Bank of America Chicago Marathon
Flat. Fast. October PR.
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Flat. Fast. October PR.Course intelligence
Know the course before you race it.
Terrain
Nearly flat loop through 29 Chicago neighborhoods. One of the fastest marathon courses in the world. Minor undulation from bridge crossings.
Conditions
October in Chicago: 45–60°F with possible wind off Lake Michigan. Historically good running conditions. 2007 was extremely hot; most years are excellent.
Aid Stations
Gatorade Endurance every mile; PowerGel at miles 7.5 and 19.
Key Challenge
The flat course is deceptive — athletes go out too fast because it feels easy. Miles 20–23 in the industrial sections are mentally and physically the hardest part of the course.
Nutrition answers for Bank of America Chicago Marathon.
What gel schedule works for Chicago?
How does a PR attempt affect nutrition planning?
What's unique about Chicago fueling?
How should I handle the industrial miles 20–23?
Does Lake Michigan wind affect my plan?
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