From his early childhood in Dunbar, Scotland, through his wilderness wanderings in the American West, John Muir was always surrounded by natural beauty. Muir was able to use his love for nature to become a famed naturalist and advocate for wilderness preservation. His work and influence would lead to the establishment of Yosemite National Park and the Sierra Club, which began in 1892, making it the oldest environmental organization in the United States. Using Muir's own words, this eBook looks at the events that shaped his life and examines the development of his worldview, his love of nature, and his passion for preservation.