Illinois Half Marathon Calendar 2025-2026

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Explore the best half marathons in Illinois for 2025-2026! Our updated list features 29 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

April 2026
Apr
11-12
Sa - Su

Allerton Races

Trail Run 5 km 10 km Half Marathon
Apr
18
Saturday

Loud Thunder 50

Trail Run 13 mi 50 km 50 mi
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
May
17
Sunday

Chicago Spring Half Marathon

5 km Half Marathon
May
31
Sunday

North Shore Classic

5 km Half Marathon
July 2026
Jul - Aug
31-1
Fr - Sa

Run Mahomet

5 km 10 km Half Marathon
August 2026
Aug
22-23
Sa - Su

Shawnee Hills Trail Races

Trail Run 13 mi 50 km 100 km 100 mi
September 2026
Sep
27
Sunday

Chicago Half Marathon

5 km Half Marathon
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