Great Western Half-Marathon & 10K

The Frozen Gnome is a challenging winter running event held in Crystal Lake, IL, featuring a scenic course through Veteran Acres and Sterne’s Woods. Participants can choose between a 50K ultra run or a 10K race, both rated as "Triple Black Diamond" for their difficulty. The 50K consists of five loop..

The 50K Mashup Slam is a series of challenging 50K trail races held throughout the Midwest, designed to celebrate the often-overlooked distance in ultrarunning. Kicking off in January with the Frozen Gnome 50K and concluding in November with the Miner 49er 50K, participants who complete all five rac..

The F^3 @ the Forge: Fat Tire Race & 10K Trail Run is set for January 12, 2025, at The Forge: Lemont Quarries in Lemont, Illinois. This exciting winter event features a variety of races, including a long course (approximately 20K) and a short course (about 10K) for fat tire biking, as well as a 10K ..

The Muddy Shamrock @ The Forge is an exciting trail running event scheduled for March 15, 2025, in Lemont, Illinois. This annual race features two main events: a Trail Half Marathon and a Trail Quarter Marathon, both set against the scenic backdrop of the historic Lemont Quarries. Participants will ..

The Earth Day 50K/15 Mile/5 Mile event, taking place in Crystal Lake, IL, offers participants a choice of three race distances. The course features a scenic 5-mile loop through rolling hills and single-track trails, designed to challenge runners while promoting an eco-friendly atmosphere. The event ..

Childish Nonsense is a whimsical running event taking place at Deer Grove Forest Preserve in Palatine, IL. Participants can choose from various distances, including a 50 Miler, 50K, 25K, and 10K, all set on a wide, non-technical trail. The event aims to foster a sense of community and joy in ultraru..