Course & Elevation
The Chicago Marathon is a fast, flat loop course that begins and ends in Grant Park, taking runners through 29 distinct Chicago neighborhoods. The route showcases the city's architecture, lakefront, and diverse communities, featuring iconic landmarks like the Willis Tower and Museum Campus. The relatively low elevation gain makes it ideal for runners targeting personal records.
Course Facts
Weather on Race Day
15°C
Temperature
65%
Humidity
30%
Rain Chance
Mid-October in Chicago typically brings mild, pleasant running conditions with cooler temperatures ideal for marathon pace. Occasional rain is possible, but the flat terrain and moderate temperatures make for favorable racing conditions.
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