Olympic National Park is a United States Olympic Park located in the Washington, in the Olympic Peninsula. U.S. President Theodore Roosevelt originally created Mount Olympus National Monument on March 2, 1909. It was designated a national park by President Franklin Roosevelt on June 29, 1938. In 1988, Congress designated 95 percent of the park as the Olympic Wilderness. Olympic park was named a world heritage site because of its natural beauty and diversity of plants