Marathons in Illinois

14 upcoming marathons in Illinois. Filter by date, exact distance, or elevation.

10K races in IllinoisHalf marathons in IllinoisUltras in IllinoisAll distances in Illinois

Browse by month

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

This calendar in numbers

This calendar currently lists 14 upcoming events, from Sep 27, 2026 to Oct 10, 2027. October is the busiest month, with 5 events scheduled. Events are spread across 12 different locations; Chicago hosts the most (3).