Hell Creek 100

OCT-NOV
30-1
2026
Multiple loop trail races at Switchgrass Mountain Bike Trail near Sylvan Grove, KS. Distances range from 10k to Pure Hell 140 and include marked single track, aid stations, runner tracking, swag, and a Halloween costume contest.
30-1 Oct-Nov 2026
140 miles 100 miles 100 kilometers 20 miles 10 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Hell Creek 100 : event overview

Hell Creek 100 is a series of looped trail races held at the Switchgrass Mountain Bike Trail in Wilson State Park near Sylvan Grove, Kansas. The course uses 20 mile loops on rugged single track with few trees and abundant views of Wilson Lake and the state park. GPS coordinates for the start/finish are N38°54.965 W98°30.549.

Distances offered:

  • Pure Hell 140 (140 mile)
  • Hell Creek 100 (100 mile)
  • 100k
  • 20 mile
  • 10k
  • 5 person team 100

Elevation gain figures are published per distance, with the 100 mile showing over 10,000 feet of gain and the Pure Hell 140 over 14,000 feet. The 10k is approximately 6 miles and uses a special marked cutoff.

Aid is provided at two manned stations: the start/finish area and Hell Hill, plus one unmanned water station near mile 5; the longest gap between water points is 6.25 miles. Aid stations offer food including vegan options, drinks, and some hot food at night. Runner tracking is available approximately every 20 miles, and professional photos are provided.

Rules note that pacers are allowed only for the 100 mile and Pure Hell 140 after three laps, crew access is restricted to the manned aid stations, runners must carry a means to hold water, participants must be at least 18, and a state park pass may be required. Refund and deferral policies are specified by the organizer. Visit the organization's website for the most recent information.

140 mi
Pure Hell 140 Mile Race
100 mi
100 Miler
100 km
100k
20 mi
20 Miler
10 km
10k
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.