Hell Creek 100

Hell Creek 100 (Wilson State Park, Sylvan Grove, KS)

Hell Creek 100 is a multi distance trail event held October 30 to November 1, 2026 at the Switchgrass trail head in the Hell Creek area of Wilson State Park. The start and finish are located near the Switchgrass restroom parking lot. GPS: N38°54.965 W98°30.549.

Distances include:

• Pure Hell 140 miles
• 100 mile
• 100k
• 5 person 100 mile relay
• 20 mile
• 10k

All races use the Switchgrass Mountain Bike Trail. The course is rugged single track with few trees and open views of Wilson State Park and Wilson Lake. Races are run on 20 mile loops: one loop for the 20 mile, three loops for the 100k, five loops for the 100 mile, and seven loops for the Pure Hell 140. Elevation gain by distance is provided, for example the 100 mile shows about 10,120 ft and the Pure Hell 140 about 14,168 ft. The 10k is roughly six miles and follows a special marked cutoff; it does not hit any aid.

Aid stations: two manned stations at the start/finish and Hell Hill, plus one unmanned water at mile 5. Aid includes food, vegan options, water, soda, electrolyte drink, and some hot food at night. Runner tracking is provided approximately every 20 miles. Professional race photos will be available.

Rules and services: pacers are allowed only for the Pure Hell 140 and the 100 mile after approximately three laps, with no muling and pacers limited to manned aid stations. Crew access is limited to manned aid stations. Minimum age is 18. Deferral and withdrawal credits follow a tiered schedule based on timing before the race. The event includes awards, distance specific swag, a Halloween costume contest with prize credits, and a veteran and active military discount if requested before registering. Visit the organization's website for the most recent information.