NK50k

Event overview

NK50k takes place on April 11, 2026 in Greenbush, WI, presented as the 13th Annual-ish edition. The event offers multiple distances:

• 50K - point-to-point on the Northern Kettle Moraine Ice Age Trail
• 25K - separate start at Crooked Lake

Registration closes Thu, Apr 9. Organizers request a contribution of $13.13 plus tax and UltraSignup fees to cover expenses. The event is described by the organizers as a run, not a race, and no results will be posted on UltraSignup.

Course and support

The 50K is a point-to-point tour of the Northern Kettle Moraine Ice Age Trail, beginning at the Ridge Road Trailhead and finishing at Greenbush Group Camp. Transportation is provided from the finish to the start. Aid and drop-bag access for 50K runners are provided at Mile 3.5, Mile 25, and at the finish; water is also available at or near backcountry shelters along the course. Aid stations list water, sports drink, Coke, Mt. Dew, and assorted typical ultra aid foods. A food and refreshment area is available at the Group Camp Shelter after the run. The course includes ski trails and sections of rocky, rooty Ice Age Trail terrain and reaches the highest point in the Northern Kettle Moraine State Forest. Visit the organization's website for the most recent information.