Marathons in United States — September 2026

28 upcoming marathons in United States during September 2026.

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This calendar in numbers

This calendar currently lists 28 upcoming events, from Sep 1, 2026 to Sep 19, 2026. September is the busiest month, with 28 events scheduled. Events are spread across 22 different locations; Dayton hosts the most (3). Course distances range from 25 km to 42.2 km.