Marathons in Michigan — September 2026
10 upcoming marathons in Michigan during September 2026.
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This calendar currently lists 10 upcoming events, from Sep 12, 2026 to Sep 26, 2026. September is the busiest month, with 10 events scheduled. Events are spread across 8 different locations; Dayton hosts the most (3). Course distances range from 32.2 km to 42.2 km.