50k Mashup Slam

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 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..

The Great Western Half-Marathon & 10K, organized by the Fox River Trail Runners, is a well-established running event held on the scenic Great Western Trail. Celebrating over 25 years, this competitive race features a flat, out-and-back course, making it accessible for runners of all levels. Schedule..

Bong Backyards is an exciting trail and ultra running event scheduled for June 6, 2025, at the Richard Bong State Recreation Area in Brighton, WI. This event caters to runners of all skill levels, offering multiple race distances, including the challenging Backyard Ultra and the shorter Backyard 24...

The Naperville Trails Half Marathon and 10K is an annual running event held in Wheaton, Illinois, featuring a scenic course through the Danada Forest Preserve. Participants can choose between a half marathon or a new 10K distance, both of which are USATF certified. The event celebrates its 15th anni..