Boston Marathon 2025 Date And Time. Registration for the 129 th boston marathon will begin on september 9 and continue through september 13, the boston athletic association (b.a.a.) announced on june 3. The qualifying period for the 2025 boston marathon was september 1, 2023 to september 13, 2024.

Join us for the boston fire cancer foundation’s 2025 marathon on april 21 in boston! Et on friday, september 13.