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Illinois Half Marathon Calendar 2025-2026

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Monthly updates for Illinois

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Explore the best half marathons in Illinois for 2025-2026! Our updated list features 33 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

December 2025
Dec
27
Sa

The Best Races - Chicago

5 km 10 km 13 mi
Dec
27
Sa

Iceman Series

5 km 10 km ... 18 km 13 mi
January 2026
Jan
3
Sa

Bodies Race Company - Shorewood

5 km 10 km Half Marathon
Jan
10
Sa

Iceman Series

5 km 10 km ... 18 km 13 mi
Jan
24
Sa

Iceman Series

5 km 10 km ... 18 km 13 mi
Jan
31
Sa

F3 Lake Half Marathon

5 km Half Marathon
February 2026
Feb
7
Sa

Iceman Series

5 km 10 km ... 18 km 13 mi
Feb
14
Sa

Fly with the Eagles Half Marathon

Half Marathon
March 2026
Mar
7
Sa

Cactus Classic Trail Races

Trail Run 10 km Half Marathon Marathon
Mar
14
Sa

Muddy Shamrock @ The Forge

Trail Run 7 mi 13 mi
Mar
15
Su

March Madness Half Marathon

Half Marathon
Mar
28
Sa

Rend Lake Marathon

11 km Half Marathon Marathon
April 2026
Apr
4
Sa

Chi Town Half Marathon

10 km Half Marathon
Apr
11
Sa

Lincoln Presidential Half Marathon

13 mi
Apr
11
Sa

Ondessonk Trail Race

Trail Run 5 km 10 km Half Marathon
Apr
11-12
Sa - Su

Allerton Races

Trail Run 5 km 10 km Half Marathon
Apr
18
Sa

Loud Thunder 50

Trail Run 13 mi 50 km 50 mi
Apr
19
Su

Naperville Women's Half Marathon

5 km Half Marathon
Apr
23-25
Th - Sa

Illinois Race Weekend

5 km 10 km Half Marathon Marathon
May 2026
May
3
Su

Chicagoland Spring Marathon

10 km Half Marathon Marathon