When Is The Chicago Marathon 2025. The bank of america chicago marathon will take place on sunday, october 12th, 2025 and is one of the year's greatest running events. One of the world’s largest and most exciting running events will take over the streets of all five.

The heightened interest for 2025 will mean more than 53,000 people are set to cross the finish line at next year’s race, set for oct. Guaranteed entry to the 2025 bank of america chicago marathon!