Boston Marathon 2025 Qualifying Dates. The qualifying times below are based upon each athlete's age on the date of the 2025 boston marathon (april 21, 2025). The qualifying window for the 129th boston marathon, scheduled to take place on april 21, 2025, began on september 1, 2023.

For the 2025 boston marathon, qualifying times must be run on or after friday, september 1, 2023. Qualifying races for the 2025 boston marathon.