Tunnel Hill 100 & 50 Mile Runs

The Tunnel Hill 100 & 50 Mile Runs, held in Vienna, Illinois, is a premier ultramarathon event featuring both 100-mile and 50-mile races. The course, renowned for its fast, smooth trail, is certified by USATF and has received the IAU Golden Label, attracting elite runners. The event has seen multiple world records set, including the women's 50-mile record by Courtney Olsen in 2024.

The 2025 edition will also serve as the USATF National Championship for the 50-mile distance. Participants can expect well-stocked aid stations, prize money for top finishers, and a supportive atmosphere for both first-time and experienced ultrarunners. Visit the organization's website for the most recent information.