Boston Marathon 2025 Registration Window Dates. The qualification window for the 2025 boston marathon began on september 1, 2023, and will close at 5 p.m. For the 2025 boston marathon, the qualifying window began on september 1, 2023 and was open through september 13, 2024.

The qualifying window for the 130th boston marathon presented by bank of america, to be held april 20, 2026, opened on september 1, 2024, and will run through the end of registration week in september 2025. Key dates and deadlines for the boston marathon 2025 qualifying window opening of the qualifying window.