Marathons in Illinois

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

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

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This calendar in numbers

This calendar currently lists 10 upcoming events, from Aug 29, 2026 to Apr 4, 2027. September is the busiest month, with 5 events scheduled.