Trail running races in Illinois, United States
Find trail running races in Illinois, United States. Compare 7 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Upcoming running events include 50K races, 10K races, 10 mile races, 25K races, 100K races and 20K races.
Events to explore include Fancy Nonsense, Paleozoic Trail Runs - Silurian Fall and McNotagain Fall Trail Runs.
7 listed events · 7 with upcoming dates
Upcoming trail running races
7 matching events, earliest date first. Entry availability is shown separately.
Fancy Nonsense
USAPalatine, Illinois
Autumn trail races at Deer Grove West. The 2026 event moves from Palos Forest Preserve while trail construction takes place.
· 25K / 50K / 5mi
Race details, entry and past editions →Paleozoic Trail Runs - Silurian Fall
USAPalos Park, Illinois
Trail races on the Sag Valley trails, using a 25K loop of gravel paths and woodland sections. The organiser lists the permit as pending.
· 25K / 50K
Race details, entry and past editions →Entry information ↗McNotagain Fall Trail Runs
USAPekin, Illinois
Autumn trail races on McNaughton Park’s hilly trails, using the familiar ten-mile loop in the reverse direction.
· 10mi / 3.5mi / 30mi / 50mi
Race details, entry and past editions →Entry information ↗The Forge Trail Run Festival
USALemont, Illinois
Looped trail races through the woods, gravel paths and historic quarries around The Forge and the I&M Canal.
· 10K / 20K / 30K / 60K
Race details, entry and past editions →Entry information ↗Frozen Gnome
USACrystal Lake, Illinois
Winter trail races on a challenging 10K loop through Veteran Acres and Sterne’s Woods.
· 10K / 50K
Race details, entry and past editions →Entry information ↗Potawatomi Trail Runs
USAPekin, Illinois
Trail races on a hilly ten-mile loop in McNaughton Park.
· 200mi
Race details, entry and past editions →Entry information ↗Shawnee Hills Trail Races
USAOzark, Illinois
Technical trail ultras through the sandstone hills and forests around Camp Ondessonk.
· 100K / 100mi / 50K / 50K Night
Race details, entry and past editions →Entry information ↗Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
No separate archived race guides are listed for this selection yet.
View full race archive (0) →Choosing a race in Illinois
The unfiltered upcoming calendar includes events in Pekin (2), Crystal Lake (1), Lemont (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about trail running races in Illinois
Which trail running races are coming up in Illinois, United States?
Fancy Nonsense is listed for 24 October 2026. Paleozoic Trail Runs - Silurian Fall is listed for 7 November 2026. McNotagain Fall Trail Runs is listed for 14 November 2026. Check the race guide and organiser’s latest information before making plans.
What running distances are listed in Illinois, United States?
Look for 50K races, 10K races, 10 mile races, 25K races, 100K races and 20K races in the upcoming listings. If an event offers several distances, check the individual race guide to choose the edition and distance you want to enter.
Where can I find race entry details for Illinois, United States?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.