The Extreme North Dakota Sandhills Ultra Run Experience (END-SURE), set for April 18, 2026, in McLeod, ND, offers an unforgettable challenge across 25K, 50K, and 100K distances. As North Dakota's first ultramarathon, END-SURE guides runners through the breathtaking Sheyenne National Grasslands, a unique landscape of wide-open prairie, dense pockets of aspen and oak forest, and distinctive, rugged, rolling "sandhills" and continuous small hills. Approximately 95% of the course traverses unpaved trails, promising a true trail running adventure. Runners consistently praise the beautiful and remote scenery, though past experiences highlight the potentially "punishing" wind and variable spring conditions, including possible snow and wet spots. Typical race day conditions in mid-April feature highs around 55°F and lows near 32°F, with an 8% chance of precipitation, but runners should be prepared for North Dakota's "mystery conditions."

The race begins and ends at Jorgen's Hollow Campground. The 100K course often covers the entire Sheyenne National Grasslands section of the North Country Trail, while 25K participants tackle multiple loops on the gently rolling Oak Leaf Trail, with aid stations every four miles. For the longer distances, aid stations are strategically placed, emphasizing a degree of self-sufficiency, with drop bag access at the halfway point for 50K and 100K runners. Runners can expect well-stocked aid stations and a welcoming atmosphere, reflecting ENDracing's reputation for friendly events. This event is not just a race; it’s an opportunity to embrace the elements, test your limits, and experience the rugged beauty of North Dakota's prairie, with profits supporting Ground Up Adventures to inspire youth through outdoor activities.