Boston Marathon 2025 Cutoff. The qualifying window for the 129th boston marathon, scheduled to take place on april 21, 2025, began on september 1, 2023. Registration details for that race will be.
A total of 36,393 qualifiers applied for the 2025 boston marathon, which was open from september 9 to. For the 2025 boston marathon, the qualifying window began on september 1, 2023 and was open through september 13, 2024.
