Fall Trail Classic - Marengo, IL

The Hobo Trail Runs, hosted by Rockford Road Runners, take place at Rock Cut State Park in Rockford, Illinois. This annual event offers multiple trail running distances including 10k, 25k, and 50k races, with options to participate in single races or the challenging Triple Crown series (85k total) o..

Dirt Circus Chicago is a one-day, free community trail-running festival in the Chicago area, organized by UltraSignup. The event blends a casual social run with a pop-up expo featuring local race directors, brands, shops, and coaches. Participants choose between two routes, approximately 4.5 miles o..

Soul Crusher is a trail-running event in Crystal Lake, Illinois, offering 5- and 10-mile options. Runners navigate single-track forest trails through Veteran Acres and Sternes Woods, with a course described as challenging, fun, and bone-decorated. The start line sits in the middle of the park at a s..

Big Timber XC Challenge is an autumn trail race held at Camp Big Timber in Elgin, Illinois (Big Timber Road at Tyrrell Road). Runners can choose between a 3-mile Run/Walk (one loop) and a 5-mile Run (two loops), with the course featuring gravel roads, open grass, wooded paths, and a creek crossing w..

The Abominable Trail Race is an exciting autumn trail running event held annually at LG Ziplines and Adventures in Lake Geneva, Wisconsin. It features three race distances: 5K, 15K, and 30K, with the 30K available for individual runners or teams of 2 to 4 in relay format. Participants navigate chall..

The Frozen Gnome is a challenging winter trail running event held in Crystal Lake, Illinois, at Veteran Acres park. Featuring a "Triple Black Diamond" rated course, the race offers a 50K ultra run and a 10K race, both run on a scenic 10K single-track loop through Veteran Acres and Sterne’s Woods. Th..