Chicago Marathon 2025 Road Closures. Those who have completed five or more chicago marathons within the last 10 years may register for the 2025 chicago marathon with a guaranteed entry. Twelve more street closures are planned around grant park — the starting and finishing points of the marathon — before the race gets underway on sunday.

More than 40 street closures for the bank of america chicago marathon will eventually go into effect, with some streets not reopening until monday. Twelve more street closures are planned around grant park — the starting and finishing points of the marathon — before the race gets underway on sunday.