Tunnel Hill 100 & 50 Mile Runs

The Tunnel Hill 100 and 50 Mile Runs are premier ultramarathon events held in Vienna, Illinois, on the scenic Tunnel Hill State Trail. Recognized for their fast, well-certified courses, the races attract elite runners aiming for world and course records, including the USATF National Championship for the 50-mile distance in 2025. The events feature a mix of trail and road elements, with a smooth crushed limestone surface and iconic tunnel crossings.

Runners can compete for substantial prize money, set personal bests, and attempt world records. The races are USATF sanctioned, IAU Golden Label, and offer amenities like aid stations, drop bags, and volunteer support, making it a top destination for ultrarunners worldwide. Visit the organization's website for the most recent information.