Tuthell 50K

Event overview

TutHell 50K is scheduled for May 2, 2026 in Sioux Falls, SD (3500 S Cliff Ave). The race distance is 50K, completed by running a 0.31-mile loop 100 times on and around Tut Hill. The course starts near a large tree by the top-of-hill bathrooms and storm shelter, follows single track down the hill to a flat grassy section, then returns up the right side of the hill to two small trees before heading back to the start. The course will be well marked. Trekking poles are allowed. No teams are permitted.

Race format and logistics

Entry is by essay-only selection; the race committee reviews essays and chosen entrants receive an invitation link to register. Registration opens February 1, 2026. The registration fee operates as a free-will donation; 100% of collected fees go to the nonprofit designated by the event winner(s), and nonprofits are vetted by the race committee. A fully stocked aid station will be located at the top of the hill by the bathrooms/storm shelter; runners are encouraged to bring personal race fueling. Entrants are expected to stay until the last runner either drops out or misses the 12-hour cutoff. Runners are asked to bring one support person; support people have access to snacks and may have beer. Official chip timing and live tracking will be provided through UltraSignup. Visit the organization's website for the most recent information.