October 10, 2021 7:42 am WATCH: 2021 Bank of America Chicago Marathon Kicks Off The 43rd running of the Bank of America Chicago Marathon kicks off as elite runners hit city streets. Local 0:52 Chicago Marathon expects another record-breaking year 0:59 Preview the 2024 Bank of America Chicago Marathon Course 1:00 2024 Bank of America Chicago Marathon moment: Sport nutrition and hydration 1:42 Elite runner Keira D'Amato drops mic to re-enter Chicago Marathon race 1:05 Abbott Chicago 5K Kicks off the Bank of America Chicago Marathon weekend.