Chicago 1/2 Marathon 2024 Registration. Applications for the 46th annual chicago marathon, which will be held on sunday, oct. Here’s a rundown of the marathon—including registration information, facts and figures about field size, past winners, and weather—plus a review of the 2023 race.

Registration is still available for runners with. The bank of america chicago marathon is a world class running event returning to the streets of chicago on sunday, october 8, 2023.