Hell Creek 100

The Hell Creek 100 is an ultramarathon event held from October 3 to 5, 2025, in Sylvan Grove, Kansas, featuring multiple race distances including the 100-mile, 100K, 20-mile, and the Pure Hell 140. The races take place on rugged, scenic single-track trails at Wilson State Park, with challenging elevation gains, especially for the 100-mile race. Participants will complete multiple loops, with aid stations providing food, drinks, and support.

The event emphasizes challenging terrain, strict rules, and a festive atmosphere, with awards for top finishers and unique swag. It is organized by Ultraverse Supplements and encourages community involvement and trail running endurance. Visit the organization's website for the most recent information.