Illinois Running Calendar 2025-2026

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Explore the best running races in Illinois for 2025-2026! Our updated list features 268 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

March 2026
Mar
21-22
Sa - Su

American Bottoms 100

55 mi 110 mi
April 2026
Apr
11
Saturday

Lincoln Presidential Half Marathon

13 mi
Apr
18
Saturday

Chicken Run

5 km 10 km
Apr
18
Saturday

Earth Day 50k

Trail Run 5 mi 15 mi 50 km
Apr
25
Saturday

Childish Nonsense

Trail Run 10 km 25 km 50 km 50 mi
May 2026
May
9
Saturday

Mother's Day Run/Walk - St. Charles

5 km
May
17
Sunday

Chicago Spring Half Marathon

10 km 13 mi
May
30
Saturday

Elsa Chicken Plucker Backyard Ultra

Backyard Ultra 4 mi
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