Tunnel Hill 100 & 50 Mile Runs
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Tunnel Hill 100 & 50 Mile Runs : Vienna, IL : November 14, 2026
Tunnel Hill is a multi-distance ultramarathon held on the Tunnel Hill State Trail in Vienna, Illinois, organized by Durbin Race Management. The event offers multiple certified distances on a crushed limestone rails-to-trail route that starts and finishes at Vienna City Park and uses out-and-back loops to create each distance.
Distances
- 100 mile
- 100 km
- USATF 50 mile National Championship
- 50 mile
- Marathon
Course and timing details: the 50 mile course runs south to the Wetlands Center then north to a northern turnaround and back to Vienna City Park; repeating the 50 mile loop yields the 100 mile. The 100 km includes an additional certified turnaround. The trail surface is smooth crushed limestone with a gentle grade. Runners pass through the tunnel multiple times: 100 km and 50 mile runners twice, 100 mile runners four times.
Time limits and rules: 100 mile, 100 km, and 50 mile competitors have a 30 hour finish limit; 100 mile runners must begin their second 50 in under 15 hours. The 50 mile event also serves as a USATF national championship; championship entrants must meet USATF eligibility requirements to receive awards and prize money.
Support and logistics: aid stations provide water, electrolyte drink, food options, porta toilets, and limited cups; drop bag procedures are specified for key aid locations. Tent camping is available at Vienna Park; RV camping is not allowed at the park. The event holds USATF, World Athletics, and IAU certifications and offers prize purses and record bonuses for designated achievements. Visit the organization's website for the most recent information.
