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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 7 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
Saturday

Cactus Classic Trail Races

Trail Run 10 km Half Marathon Marathon
Mar
28
Saturday

Rend Lake Marathon

10 km Half Marathon Marathon
April 2026
Apr
23-25
Th - Sa

Illinois Race Weekend

5 km 10 km Half Marathon Marathon
Apr
25
Saturday

Nauvoo Marathon

2 mi 26 mi
May 2026
May
3
Sunday

Chicagoland Spring Marathon

10 km Half Marathon Marathon
September 2026
Sep
27
Sunday

Quad Cities Marathon

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

Chicago Marathon

Marathon
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