Trail Running Calendar North Dakota 2026-2027

END-SURE is North Dakota's original ultramarathon, taking runners through the rugged sandhills, prairies, and forests of the Sheyenne National Grasslands. Choose from 25K, 50K, and 100K distances on the scenic North Country Trail.

A two-day festival at Harmon Lake on June 12-13, 2026 featuring evening trail runs (~3.5 and 12-13 miles) and a mountain bike race with 13, 35, and 55-mile options, chip timing, cash prizes, onsite camping, and group registration discounts.

A multi distance trail event on the Maah Daah Hey Trail near Medora, North Dakota, on July 24 and 25, 2026. Distances range from a 5K to a 116 mile ultra with aid stations, checkpoints, creek crossings and formal pacer rules.