National Geographic : 1971 Jun
"A place for angels," wrote naturalist John Muir, remembering a flowering Sierra glade. Morning sun in Yosemite National Park adds fire to Indian paintbrush (right), a trail decoration from border to border. A member of the Sierra Club, founded by Muir to spur exploration and conservation, takes a song break (below) during a week-long cleanup of a segment of the trail named for Muir. Half a million acres of national wilderness and 212 miles of footpath in California honor John Muir, life long champion of such preserves. But trail damage through careless use and heavy traffic may soon force limita tion of the number of hikers. The 1964 Wilderness Act directs that wild areas remain as natural as possible, "... un trammeled by man, where man him 750 self is a visitor who does not remain."