Marathons in Illinois — September 2026

7 upcoming marathons in Illinois during September 2026.

Browse by state

All United StatesAlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdaho

Other months in Illinois

JanuaryFebruaryMarchAprilMayJuneJulyAugustOctoberNovemberDecember

This calendar in numbers

This calendar currently lists 7 upcoming events, from Sep 7, 2026 to Sep 27, 2026. September is the busiest month, with 7 events scheduled. Course distances range from 32.2 km to 42.2 km.