Chicago Half Marathon 2025 Registration Process. 2025 bank of america chicago marathon application the bank of america chicago marathon, a member of the abbott world marathon majors and an internationally renowned. Registration for the chicago marathon typically opens in october, with the lottery application process running from october to december the year before the race.


Chicago Half Marathon 2025 Registration Process

Registration for the events is now open, with those signing up through oct. The fee will increase to $51 at 11:59 p.m.

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