Theodore Roosevelt National Park in North Dakota was first developed as Roosevelt Recreational Demonstration Area. In 1946 the area became Theodore Roosevelt National Wildlife Refuge. An Act of Congress on April 25, 1947, established Theodore Roosevelt National Memorial Park and returned its administration to the National Park Service. In 1978, Congress officially changed the park's name to Theodore Roosevelt National Park and designated 29,920 acres of the park's lands as wilderness. Photo by the National Park Service.