The areas marked “Mather (San Francisco Recreation Camp)” and “Stables” encompass today’s Camp Mather and the backcountry areas around the historic Hog Ranch.
“Mather Station” is the nearby National Park Service gate into Yosemite National Park’s Hetch Hetchy area. The long, snake-like body of water just to the northeast of Mather is the Hetch Hetchy reservoir itself, the primary source of water for San Francisco. The construction of the reservoir’s O’Shaughnessy Dam is why Camp Mather exists today.
Meanwhile, the point marked “Evergreen” is Camp Mather’s neighbor, a historic lodge and resort. Evergreen Lodge was built by opportunistic entrepreneurs as a roadhouse bar (and brothel!) serving the dam workers, but today is a wholesome, family-friendly resort.
The map was created by Lewis W. Clark and published by the Stanford University Press in 1954. It is one of a series of three “pocket guides” and is a companion to the “Pocket Guide to the South Boundary Country” (1955) and the “Pocket Guide to the High Sierra Camp Areas, Yosemite National Park” (1953).