Chicago Marathon 2025 Map Route. More than 50,000 participants are expected to flood the streets of chicago on oct. All you need to know about chicago marathon, including course map, elevation profile, the expo, hotels, transportation and weather.

This comprehensive guide has everything you need to know to make your race day a success. On this page is shown the 42.195 km (26.2 mi) course map of the event bank of america chicago marathon in chicago, illinois (sunday, october 13, 2025).