Upper Souris National Wildlife Refuge lies in the beautiful Souris River Valley of north-western North Dakota and extends for nearly 30 miles along the River. This 32,000-acre Refuge, managed by the U.S. Fish and Wildlife Service, is an important unit in a series of national wildlife refuges in the great waterfowl migration corridor know as the Central Flyway. A self guided tour south of Lake Darling Dam affords views of the Souris River marshlands and prairie grasslands. Fishing, hunting, boating and picnicking are permitted. Refuge open daily 5am-10pm.