2025 Chicago Marathon Registration Deadline. The application period is open for 4 weeks and there are no exceptions for late entry, so you need to act on this now if you’d like to claim a. In its 47th year, the marathon will take place on sunday, october 12, 2025.


2025 Chicago Marathon Registration Deadline

Applications for the 47th annual bank of america chicago marathon can be accepted beginning at 10 a.m. Below are anticipated dates for future runnings of.

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