Theodore Roosevelt did more for the national park idea than any other president in history. During a cross-country trip in 1903, he spent three nights camping alone in Yosemite with the other great champion of the parks, mountain prophet John Muir, who enlisted Roosevelt into making Yosemite Valley part of a larger national park. Snow fell on them the night they camped here, near Glacier Point. It was, the outdoorseman president recalled, "the grandest day of my life." Source: The Library of Congress.