Lake Ilo National Wildlife Refuge is located in west-central North Dakota 1 mile west of Dunn Center along State Highway 200. The Refuge is currently a staffed satellite station of the Audubon National Wildlife Refuge Complex.
The Refuge contains 4,034 acres of prairie, grasslands, and wetlands. The uplands are characterized by gently sloping hills and terraces with creeks and an occasional slough. The average rainfall of 16.8 inches supports a prairie environment with a climate of hot dry summers, occasional thunderstorms, and cold winters. All of these factors influence the plants and animals that make Lake Ilo NWR their home.