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Illinois Trail Running Calendar 2026-2027

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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 2026-2027! Our updated list features 61 exciting races across the region. Find your next race in Illinois below and join the running community at these great events!

February 2026
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
14
Sa

Blarney Blitz

Trail Run 5 km
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

Skunk Ape 806/314 Trail Race

Trail Run 14 mi 34 mi
Mar
28
Sa

Clinton Lake Ultra

Trail Run 10 mi 30 mi
April 2026
Apr
4
Sa

Abe Lincoln Trail Trek

Trail Run 5 km 10 km
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
Apr
11
Sa

Chauncey's 4 at The Farm

Trail Run 6 km
Apr
12
Su

Allerton Races

Trail Run 5 km 10 km Half Marathon
Apr
18
Sa

Earth Day 50k

Trail Run 5 mi 15 mi 50 km
Apr
18
Sa

Loud Thunder 50

Trail Run 13 mi 50 km 50 mi
Apr
18
Sa

The Champion of Trees 10K

Trail Run 10 km
Apr
25
Sa

Childish Nonsense

Trail Run 10 km 25 km 50 km 50 mi
Apr
25
Sa

Saw Wee Kee - Spring Trail Run

Trail Run