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Illinois Running Calendar 2025-2026

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Monthly updates for Illinois

Get new running races (and updates) in your inbox every month.

Explore the best running races in Illinois for 2025-2026! Our updated list features 284 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

Half Marathons Marathons Trail Runs Triathlons
December 2025
Dec
20
Sa

Saturday Before Christmas Run

2 mi 5 km 4 mi 12 km
Dec
20
Sa

Chase the Elf 10k

5 km 10 km
Dec
20
Sa

Jingle Jog 5K - Pontiac

5 km
Dec
20
Sa

The Gingerbread Jog 5K

5 km
Dec-Mar
20-21
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi
Dec
20
Sa

Reindeer Run - Columbia

5 km
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
1
Th

Resolution Run - Olympia Fields

6 km
Jan
1
Th

Cheers to New Year's 5k

5 km
Jan
1
Th

Way of Lights Run

2 mi 5 km
Jan
1
Th

New Year's Day Fun Run & Walk

2 mi 3 mi
Jan
3
Sa

Siberian Express

Trail Run 7 mi
Jan
3
Sa

Snowman Shuffle

5 km
Jan
3
Sa

Bodies Race Company - Shorewood

5 km 10 km Half Marathon
Jan
10
Sa

Frozen Gnome

Trail Run 10 km 50 km
Jan
10
Sa

50k Mashup Slam

Trail Run 50 km
Jan
10
Sa

Iceman Series

5 km 10 km ... 18 km 13 mi
Jan
17
Sa

Chilly Chili 4.37 Mile Run

4 mi
Jan
17
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi