Illinois Marathon Calendar 2025-2026

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Explore the best marathons in Illinois for 2025-2026! Our updated list features 6 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

November 2025
Nov
8
Saturday

Tunnel Hill 100 & 50 Mile Runs

Trail Run Marathon 50 mi 100 km 100 mi
Nov
8
Saturday

Springfield Marathon

10 km Half Marathon Marathon
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
May 2026
May
3
Sunday

Chicagoland Spring Marathon

10 km Half Marathon Marathon
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