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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 35 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

May 2026
May
3
Su

Great Western Half-Marathon & 10K

Trail Run 10 km Half Marathon
May
9
Sa

Starved Rock Country Marathon

5 km 10 km Half Marathon Marathon
May
17
Su

Chicago Spring Half Marathon

5 km Half Marathon
May
30
Sa

Red Cedar Trail Races at Giant City State Park

Trail Run 5 km Half Marathon 40 km
May
31
Su

North Shore Classic

5 km Half Marathon
June 2026
Jun
7
Su

Bank of America Chicago 13.1

13 mi
July 2026
Jul-Aug
31-1
Fr - Sa

Run Mahomet

5 km 10 km Half Marathon
August 2026
Aug
15
Sa

RAMP River Run – 1/2 Marathon

3 km 5 km Half Marathon
Aug
22-23
Sa - Su

Shawnee Hills Trail Races

Trail Run 13 mi 50 km 100 km 100 mi
September 2026
Sep
20
Su

Fox Valley Marathon Races

5 km Half Marathon 20 mi Marathon
Sep
27
Su

Chicago Half Marathon

5 km Half Marathon
Sep
27
Su

Quad Cities Marathon

5 km 10 km Half Marathon Marathon
October 2026
Oct
17
Sa

Run Stephenson County

5 km 10 km Half Marathon
Oct
18
Su

Naperville Half Marathon

5 km 6 mi 13 mi
Oct
25
Su

Haunted Halloween Half Marathon

5 km 13 mi