Tuthell 50K

Event overview

TutHell 50K is a running event in Sioux Falls, SD, scheduled for May 2, 2026. The race distance is 50K. Registration opens February 1, 2026. Entry is by essay only; the race committee reviews essays and selects entrants. The essay deadline is in April 2025. The registration model uses a free will donation pledge system - 100% of registration pledges go to the non-profit of the winning male and female runners. Non-profits are vetted by the committee.

Course and race format

The course is a 0.31-mile loop on Tut Hill to be completed 100 times. Each loop includes about 90 feet of elevation gain and 90 feet of elevation loss. Runners start near the large tree by the hilltop bathrooms, follow single track down to the flat grassy section, and return up the right side of the hill to the two small trees before the next loop. The route will be well marked and a route map is provided.

Support and logistics

Trekking poles are allowed. No teams are permitted. All entrants are expected to remain until the last runner has either dropped out or missed the 12-hour cutoff. There will be a fully stocked aid station at the top of the hill by the bathrooms and storm shelter. Runners are encouraged to bring their own fueling. Support people are allowed and have access to snacks and beverages. Official chip timing and live tracking are provided. Visit the organization's website for the most recent information.