Hell Creek 100

Dorrance, United States • 30-1 Oct-Nov 2026

Hell Creek 100 Race Series

The Hell Creek 100 Race Series is held on the Switchgrass Mountain Bike Trail at Wilson State Park. The course is rugged single-track with few trees and frequent views of Wilson State Park and Wilson Lake. The route is heavily marked with ribbons and wrong-way signs.

Distances offered:

  • 140-mile
  • 100-mile
  • 100K
  • 20-mile
  • 10K

Elevation gain by distance ranges from 442 ft for the 10K to 14,168 ft for the Pure Hell 140. The course is run as roughly 20-mile loops: one loop for 20-mile runners, three loops for 100K runners, five loops for 100-mile runners, and seven loops for 140-mile runners. The 10K uses a shortened version of the loop and will take a cutoff.

Aid stations provide a featured electrolyte and carbohydrate drink, Proxima C, and typical aid station items. There are restrooms at the start and finish and porta-potties at the Hell Hill aid station. There is no on-course aid station for the 10K, so 10K participants must carry their own supplies. Hot showers are available at the start/finish and at Big Bluestem Campground about three quarters of a mile away.

Photographers will be present on Saturday and race photos are available free to download within one to two weeks. Awards are given to the top three male and female finishers in each category. Swag varies by distance and includes shirts, bags, medals or buckles, and a beer for finishers. Visit the organization's website for the most recent information.

Race information

140 mi
Pure Hell 140 Mile
100 mi
100 Mile
100 km
100k
20 mi
20 Mile
10 km
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Trail half marathon and 50k on the single-track Switchgrass Mountain Bike Trail at Wilson State Park. Exposed, hilly course beside Wilson Lake with two aid stations, marked routing, awards, and finisher items for each distance.

A last man standing backyard ultra held on single-track trails at Wilson State Park. Runners repeat 4.167 mile laps with one hour to complete each lap; crews are limited and aid is at the start finish only.

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