Grand Teton National Park was established in 1929; Jackson Hole National Monument was created in 1943. The two units were combined to become the present Grand Teton National Park in 1950. The park is 45 miles in length from north to south, 26 miles maximum width. Grand Teton is famous for spectacular mountain scenery and wildlife. Park boundaries include approximately 310,000 acres, 485 square miles. John D. Rockefeller, Jr. Memorial Parkway was established in 1972 to commemorate the philanthropic activities of John D. Rockefeller, Jr. and his generous donations of lands to the National Park System. The parkway connecting Yellowstone and Grand Teton national parks contains 23,700 acres. The Parkway is managed as a recreation area under the administration of Grand Teton National Park.