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Illinois Trail 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 trail runs in Illinois for 2025-2026! Our updated list features 50 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

December 2025
Dec-Mar
20-21
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi
January 2026
Jan
3
Sa

Siberian Express

Trail Run 7 mi
Jan
10
Sa

Frozen Gnome

Trail Run 10 km 50 km
Jan
10
Sa

50k Mashup Slam

Trail Run 50 km
Jan
17
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi
Jan
24
Sa

Fox Valley Winter Challenge Trail Series

Trail Run 5 km
Jan
31
Sa

Frozen Tundra 5K

Trail Run 5 km
February 2026
Feb
14
Sa

Frozen Cock's Crow 5k

Trail Run 3 mi
Feb
21
Sa

Fox Valley Winter Challenge Trail Series

Trail Run 8 km
Feb
21
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi
Feb
28
Sa

Saw Wee Kee - Winter Trail Run

Trail Run
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
21
Sa

Skunk Ape 806/314 Trail Race

Trail Run 14 mi 34 mi
Mar
21
Sa

Tour de Trails - Rockford

Trail Run 3 mi 6 mi 9 mi 12 mi
Mar
22
Su

Fox Valley Winter Challenge Trail Series

Trail Run 10 km
Mar
28
Sa

Chauncey's 4 at The Farm

Trail Run 4 mi
Mar
28
Sa

Clinton Lake Ultra

Trail Run 10 mi 30 mi
April 2026
Apr
9-12
Th - Su

Potawatomi Trail Runs

Trail Run 10 mi 30 mi ... 150 mi 200 mi
Apr
11
Sa

Ondessonk Trail Race

Trail Run 5 km 10 km Half Marathon