Boston Qualifying Times 2025 Dates. The qualifying period for the 2025 boston marathon was september 1, 2023 to september 13, 2024. The qualifying window for the 129th boston marathon, scheduled to take place on april 21, 2025, began on september 1, 2023.
New standards were implemented for the 2026 race, so you’ll want to check those out. The qualifying window began on september 1, 2023, and remains open through.