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The Eternal Damnation Backyard

Name: The Eternal Damnation Backyard
Start: 2026-04-18
End: 2026-04-18
Location: Sylvan Grove

Sylvan Grove, United States • 18 Apr 2026

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, rated among the state’s best and EPIC-certified. Each loop is 4 miles 880 feet (6.7056 km) and must be completed within one hour; laps start hourly in a last-man-standing Backyard Ultra format. It’s self-supported, with swag (shirt, finishers plaque) and special awards; 2 crew members allowed; water and endurance fuel provided. First race in Ultraverse Kansas Slam. Visit the organization's website for the most recent information.

United States Kansas Sylvan Grove

Race information

Website Registration

7 km

Loop: 6.7056 Kilometers (4 Miles 880 Feet)

Visit the organization's website for the most recent information.

Trail runs nearby

Fri - Sun Oct 3-5

Hell Creek 100

Dorrance - 15 mi from Sylvan Grove

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 r..