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Illinois Marathon Calendar 2025-2026

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Explore the best marathons in Illinois for 2025-2026! Our updated list features 9 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

March 2026
Mar
7
Sa

Cactus Classic Trail Races

Trail Run 10 km Half Marathon Marathon
Mar
28
Sa

Rend Lake Marathon

11 km Half Marathon Marathon
April 2026
Apr
12
Su

Spring Chance BQ.2 Marathon

26 mi
Apr
23-25
Th - Sa

Illinois Race Weekend

5 km 10 km Half Marathon Marathon
Apr
25
Sa

Nauvoo Marathon

2 mi 26 mi
May 2026
May
3
Su

Chicagoland Spring Marathon

10 km Half Marathon Marathon
May
9
Sa

Starved Rock Country Marathon

5 km 10 km Half Marathon Marathon
September 2026
Sep
27
Su

Quad Cities Marathon

5 km 10 km Half Marathon Marathon
October 2026
Oct
11
Su

Chicago Marathon

Marathon