Boston Qualifying Times 2026 Grand Prix. This list ranks marathons based on the number of runners who ran under the qualifying standards within the 2026 boston marathon qualifying window (between 9/1/2024 and 9/12/2025. The boston athletic association has tightened the qualifying times for the 2026 boston marathon after a record number of registrations for 2025 under the current standards.

The field size was then increased in 1987 and the time standards were concurrently made. Immediately after the 2025 window closed, boston marathon announced new qualifying times for 2026 (listed below).