President Theodore Roosevelt and conservationist John Muir, the founder and first president of the Sierra Club, in Yosemite Valley, Calif. When Mr. Roosevelt became president in 1901, the United States had only five national parks, including Yosemite. During his administration, President Roosevelt not only doubled the number of national parks, but also designated 150 national forests, the first 51 federal bird reservations, the first 18 national monuments, the first four national game preserves and the first 21 reclamation projects. (1903) National Archives, Records of the National Park Service