Tunnel Hill 100 & 50 Mile Runs

The Tunnel Hill 100 & 50 Mile Runs take place in Vienna, Illinois, on the scenic Tunnel Hill State Trail, a smooth crushed limestone rails-to-trails path featuring gentle grades and iconic landmarks like a historic tunnel and trestles. The event offers 100-mile and 50-mile distances, both USATF-sanctioned and IAU Golden Label certified, attracting elite and first-time ultrarunners alike. The course is fast and flat, with minimal technical challenges, making it ideal for record attempts—several world records have been set here.

Aid stations provide varied nutrition, and pacers are allowed under specific rules. The race fosters a supportive atmosphere with strong volunteer involvement and offers prize money and finisher swag, including custom belt buckles. Visit the organization's website for the most recent information.