NK50k

Greenbush, United States • 3 Apr 2027

NK50k

NK50k takes place on April 3, 2027, in Greenbush, Wisconsin. The event consists of trail runs along the Northern Kettle Moraine Ice Age Trail with organized support and finish area facilities at Greenbush Group Camp.

Distances offered:

  • 50K
  • 25K

The course is point to point, starting at the Ridge Road Trailhead and finishing at the Greenbush Group Camp Shelter. Transportation is provided from the finish to the start. Aid and access to drop bags for 50K entrants are provided at the finish and at Mile 3.5 and Mile 25, with additional water available near backcountry shelters along the route. Aid station supplies include water, sports drink, Coke, Mt. Dew and assorted typical ultra aid station foods. After the runs, food and refreshments are provided at the Group Camp Shelter.

Organizers describe the event as a run rather than a race and note that results will not be posted on UltraSignup. The trails in the Greenbush area include smooth and rolling ski trails, rocky and rooty sections of the Ice Age Trail, and access to the highest point in the Northern Kettle Moraine State Forest. Organizers also note variable spring conditions, including possible snow. Visit the organization's website for the most recent information.

Race information

50 km
50k
25 km
25k
Visit the organization's website for the most recent information.
Trail runs nearby

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A community run/walk in Brillion honoring Mike Ariens, featuring 10K, 5K and a Kids 1K on trails and downtown routes, with finish-line ice cream, commemorative bucket hats, medals, and shuttle service between venues.

Trail marathon and half marathon at High Cliff State Park near Sherwood WI on September 20, 2026, featuring Lake Winnebago views, technical single track and prairie sections. Aid stations, a postrace pasta buffet, and a cupless policy are p..

Trail runs and a 1-mile walk at Fox Hill Nature Preserve on 10/11/2026, held to support conservation in the Cedar Lakes region; varied distances include 5K, 10K, a 1-mile walk, and a Kiddos 1K.

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