Corbis Yosemite Falls in Yosemite National Park Chee-Onn Leong / iStockphoto The naturalist John Muir is so closely associated ... quotes—"Climb the mountains and get their good tidings.

Muir's three-night camping trip with President Theodore Roosevelt in 1903 could be considered the most significant camping trip in conservation history. John Muir was one of the earliest advocates ...