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Preservation vs conservation

In July 1896, Muir became associated with Gifford Pinchot, a national leader in the conservation movement. Pinchot was the first head of the United States Forest Service and a leading spokesman for the sustainable use of natural resources for the benefit of the people. His views eventually clashed with Muir's and highlighted two diverging views of the use of the country's natural resources. Pinchot saw conservation as a means of managing the nation's natural resources for long-term sustainable commercial use. As a professional forester, his view was that "forestry is tree farming", without destroying the long-term viability of the forests. Muir valued nature for its spiritual and transcendental qualities. In one essay about the National Parks, he referred to them as "places for rest, inspiration, and prayers." He often encouraged city dwellers to experience nature for its spiritual nourishment. Both men opposed reckless exploitation of natural resources, including clear-cutting of forests. Even Muir acknowledged the need for timber and the forests to provide it, but Pinchot's view of wilderness management was more resource-oriented.

Their friendship ended late in the summer of 1897 when Pinchot released a statement to a Seattle newspaper supporting sheep grazing in forest reserves. Muir confronted Pinchot and demanded an explanation. When Pinchot reiterated his position, Muir told him: "I don't want any thing more to do with you". This philosophical divide soon expanded and split the conservation movement into two camps: the "preservationists", led by Muir; and Pinchot's camp, who used the term "conservation". The two men debated their positions in popular magazines, such as Outlook, Harper's Weekly, Atlantic Monthly, World's Work, and Century. Their contrasting views were highlighted again when the United States was deciding whether to dam Hetch Hetchy Valley. Pinchot favored damming the valley as "the highest possible use which could be made of it". In contrast, Muir proclaimed, "Dam Hetch Hetchy! As well dam for water-tanks the people's cathedrals and churches, for no holier temple has ever been consecrated by the hearts of man".

In 1899, Muir accompanied railroad executive E. H. Harriman and esteemed scientists on the famous exploratory voyage along the Alaska coast aboard the luxuriously refitted 250-foot (76 m) steamer, the George W. Elder. He later relied on his friendship with Harriman to pressure Congress to pass conservation legislation.

In 1903, President Theodore Roosevelt accompanied Muir on a visit to Yosemite. Muir joined Roosevelt in Oakland, California, for the train trip to Raymond. The presidential entourage then traveled by stagecoach into the park. While traveling to the park, Muir told the president about state mismanagement of the valley and rampant exploitation of the valley's resources. Even before they entered the park, he was able to convince Roosevelt that the best way to protect the valley was through federal control and management.

After entering the park and seeing the magnificent splendor of the valley, the president asked Muir to show him the real Yosemite. Muir and Roosevelt set off largely by themselves and camped in the back country. The duo talked late into the night, slept in the brisk open air of Glacier Point, and were dusted by a fresh snowfall in the morning. It was a night Roosevelt never forgot. He later told a crowd, "Lying out at night under those giant Sequoias was like lying in a temple built by no hand of man, a temple grander than any human architect could by any possibility build." Muir, too, cherished the camping trip. "Camping with the President was a remarkable experience", he wrote. "I fairly fell in love with him".

Muir then increased efforts by the Sierra Club to consolidate park management. In 1906 Congress transferred the Mariposa Grove and Yosemite Valley to the park.