What Is The Date Of The 2025 Chicago Marathon Registration. The 2025 bank of america chicago marathon will be held on sunday, oct. To create consistency and predictability for community members impacted by the bank of america chicago marathon, the chicago marathon takes place on the second sunday of october.

The 2025 bank of america chicago marathon will take place on sunday, october 12, 2025. The 2025 bank of america chicago marathon, a member of the abbott world marathon majors, will start and finish in grant park beginning at 7:30 a.m.