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Tunnel Hill 100 & 50 Mile Runs

Vienna, United States • 8 Nov 2025

Tunnel Hill 100 & 50 Mile Runs take place in Vienna, Illinois along the Tunnel Hill State Trail. The event offers 100-mile and 50-mile distances on a crushed limestone trail, with wetlands, trestles, and a historic tunnel; the 100-mile course repeats the 50-mile loop four times, the 50-mile loop twice. It is USATF-sanctioned and IAU-certified, with 2024 UTMB index status and a Western States qualifier for 2026.

The 30-hour time limit applies to both distances; aid stations are spaced about every 3–5 miles and runners should carry fluids. Pacers are allowed under USATF rules, with restrictions for record attempts. Notable records include Herron’s 100-mile world mark and Olsen’s 50-mile record. Visit the organization's website for the most recent information.

United States Illinois Vienna

Race information

Website Registration
UTMB 50K UTMB 100M
100 mi
100 Mile
50 mi
50 Mile
Visit the organization's website for the most recent information.
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