John Muir, America’s pioneer conservationist and father of the national park system, was a man of considerable literary talent. As he explored the wilderness of the western part of the United States for decades, he carried notebooks with him, narrating his wanderings, describing what he saw, and recording his scientific researches. This reprint of his journals, edited by Linnie Marsh Wolfe in 1938 and long out of print, offers an intimate picture of Muir and his activities during a long and productive period of his life.