What is Hetch Hetchy Valley?
Hetch Hetchy is a glacier-carved valley in California’s Yosemite National Park. Naturalist John Muir called it a “wonderfully exact counterpart” of Yosemite Valley, likening its waterfalls and sheer granite walls to those in its more famous twin. In the early 20th century, after a historic struggle, Hetch Hetchy Valley was dammed by San Francisco to expand its water supply system.
