Earn the (Almost) World Famous NK50k Finisher Sticker! Join us for a point-to-point tour of the Northern Kettle Moraine Ice Age Trail! It's time to welcome Spring to the Northern Kettle Trail Running Community ... which means it will most likely be snowing! At 7:00 AM, we will start at the Ridge Road Trailhead, just southwest of Sunburst Ski Hill. Transportation will be provided to the start from the finish (Greenbush Group Camp), leaving at 6:00 AM. After we're done, we'll enjoy some food and refreshments at the Group Camp Shelter. This stop is also where Aid will be provided to the 50k runners. Aid and access to drop bags for the 50k runners will also be provided at Mile 3.5 and at Mile 25. There is water available along the course at additional spots as well, at or near the backcountry shelters. The Schedule This event will sell out, so register soon! 5:30-5:55 - 50K runner Check-in. 6:00 AM - The BUS will be leaving from the Greenbush Group Camp to take runners to the start at Ridge Road. 7:00 AM - The NK50K Starts at Ridge Road. Have fun! 9:00 AM - 25K runner check in. 9:30 AM - The BUS leaves Greenbush Group Camp to take runners the the 25K Start at Crooked Lake. 10:00 AM - NK25K run starts, have fun! Welcome back to Greenbush! Congrats on a great morning in the Northern Kettles! Celebrate with us at the Finish area Shelter. Aid Stations will include Water, Sports Drink, Coke, Mt. Dew and assorted normal "Ultra Aid Station" foods. And Finally...REMEMBER: This is a fun run. The best effort will be made to provide aid as scheduled and at those locations, but stuff happens, so go in to this run assuming you're on your own! No Whining! ** No Results Will Be Posted on UltraSignup.com. This is a RUN. This is NOT A RACE. **
From smooth and rolling ski trails, to the rocky and rooty Ice Age Trail, to the highest point in the Northern Kettle Moraine State Forest, the Greenbush area trails have it all!
Apr 03, 2027
Distance — 50K
Type — Running
07:00
$19.99
Apr 03, 2027
Distance — 25K
Type — Running
09:00
$19.99
These values represent the 3-year monthly averages for April in Greenbush.
Learn more about the host city, Greenbush.
Greenbush is an unincorporated town in Sheboygan County, Wisconsin, United States. The population was 2,773 at the 2000 census. It is included in the Sheboygan, Wisconsin Metropolitan Statistical Area. The census-designated place of Greenbush is located in the town. The unincorporated community of German Corners is also located in the town. Greenbush hosts the Kettle Moraine Correctional Institution.
Read more launchTours and activities near Greenbush, powered by Viator.
Read what other athletes have to say about their experience at the NK50k.
Be the first to share your experience with the community!
Spotted an error or missing detail about the NK50k? Help us improve.
Explore other exciting events happening in this same region.
Hand-picked events we think you’ll love.
Oct 06, 2026
HOSTED BY: SendTown Bike Club, a local 501(c)(3) nonprofit, and our Community Partners, courtesy of New Belgium Brewing…
Read more
Oct 06, 2026
The Empire State Building Observation Deck Run-Up —the world’s first and most famous tower race—challenges runners from…
Read more
Oct 06, 2026
Join us every Tuesday evening at Interruption Public House & Brewery for Tuesday Brewsday — a casual weekly run followe…
Read more