In 1903, President Theodore Roosevelt joined naturalist John Muir on a trip to Yosemite. Camping by themselves in the uncharted woods, the two men saw sights and held discussions that would ultimately lead to the establishment of America's National Parks. Full color.-Roosevelt, Theodore -Travel
-Yosemite Valley -Muir, John
-Yosemite National Park (Calif.) -History
-National parks and reserves -United States
-Environmentalism -California