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Hell Creek 100

Dorrance, United States • 3-5 Oct 2025

Hell Creek 100 is an Ultraverse Supplements endurance event held in Sylvan Grove, Kansas, with the start/finish at the Switchgrass trail head in Wilson State Park. The weekend offers Pure Hell 140, Hell Creek 100, 100K, and 20 Mile, with the 100-miler delivering the elevation gain (10,120 ft). The rugged single-track features views of Wilson Lake, and races run as loops (20 miles for the 20-miler; three loops for 100K; five for 100-miler; seven for Pure Hell 140). Staffed aid stations at Start/Finish and Hell Hill; pacers allowed for longer races; minimum age 18. Finisher buckles, shirts, beer, and swag. Visit the organization's website for the most recent information.

United States Kansas Dorrance

Race information

Website Registration
140 mi
14168 m+
Pure Hell 140
100 mi
10120 m+
100 Miler
100 km
6072 m+
100k
20 mi
2024 m+
20 Miler
Visit the organization's website for the most recent information.
Trail runs nearby

The Eternal Damnation Backyard

Sylvan Grove - 15 mi from Dorrance

Location: Wilson State Park (Hell Creek area) outside Dorrance, KS, with start/finish in the Switchgrass Mountain Bike Trail parking lot. The course begins with 3/4 mile of pavement before switching to 100% single-track along Wilson Lake, touted as Kansas’ clearest lake, and the Switchgrass Trail, r..

Hell Creek Half & 50K

Sylvan Grove - 15 mi from Dorrance

The Hell Creek Half & 50K takes place at Wilson State Park on the single-track Switchgrass Mountain Bike Trail. The event date is August 29, 2026. The trail runs largely beside Wilson Lake and is described as very hilly, exposed with little tree cover, and not overly rugged. There is a time cut..