Hell Creek 100

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.