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Hell Creek 100

Name: Hell Creek 100
Start: 2025-10-03
End: 2025-10-05
Location: Dorrance

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

Saturday Apr 18

The Eternal Damnation Backyard

Sylvan Grove - 15 mi from Dorrance

Backyard Ultra

7 km

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..