Fox Valley Winter Challenge Trail Series

The Chicago 7-11 Hour Endurance Run, organized by Yeti Trail Runners, is a unique trail running event set in Willow Springs, IL. Participants can choose between a 7-hour or 11-hour endurance challenge, navigating a scenic 4-mile loop through the picturesque Wolf Road Woods and Palos Preserves. The e..

The Hickory Knolls Trail Run, held at Hickory Knolls Nature Area in St. Charles, Illinois, offers 5K and 10K individual races plus a 10K two-person relay. The course features a scenic, approximately 3-mile loop of grass, dirt, and gravel trails with a mix of flat sections and hills, set in a diverse..

The Naperville Trails Half Marathon & 10K is an annual running event held in Wheaton, Illinois, at the scenic Danada Forest Preserve. Scheduled for September 6, 2025, the race offers both half marathon and 10K distances, including virtual options. The course is USATF certified, featuring a flat and..

The Fancy Nonsense 25K/50K is a whimsical running event designed to bring joy and laughter to participants while challenging their physical and mental limits. Set in the scenic Palos Trail System near Chicago, the race features a 5.5-mile loop course primarily on single track trails. Runners can cho..

The Forge Trail Run Festival, scheduled for November 15, 2025, in Lemont, IL, features a variety of trail running events including 10K, 20K (Half Marathon), 30K, and 60K races. Participants will navigate single and double-track trails through scenic woods and gravel paths around the historic Lemont..

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, a 10K race, and relay options for teams of two or five. The course consists of a scenic 10K single-track..