When Is The Chicago Marathon 2025 Date. In its 47th year, the marathon will take place on sunday, october 12, 2025. Tune in before the race to listen to the bank of america chicago marathon preview shows featuring running experts and the chicago marathon executive race director, carey.

2025 bank of america chicago marathon. Starting and finishing in grant park, the chicago marathon is a very flat race taking runners round one of the usa’s most iconic cities.