Bridalveil Fall looms over the Merced River in Yosemite National Park, which John Muir helped preserve. Some environmentalists say population growth, urban sprawl, demographic shifts and climate change have made a relic of Muir’s approach. (Mark Boster / Los Angeles Times)
American naturalist John Muir, who died in 1914. (Hulton Archive / Getty Images)
President Theodore Roosevelt, left, at Yosemite with John Muir. (MPI / Getty Images)
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The base of Upper Yosemite Falls during a 30-second exposure. John Muir was instrumental in preserving the Yosemite Valley. (Mark Boster / Los Angeles Times)
