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

January 2026
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 5 km
Feb
14
Sa

Galena Classic Sasquatch Shuffle

Trail Run 3 km
Feb
17
Tu

Fat Tuesday 10K Run at Keg Grove

Trail Run 5 km 10 km
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

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