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The Hetch Hetchy Valley began as a V-shaped river canyon cut out by the ancestral Tuolumne River. About one million years ago, the extensive Sherwin glaciation widened, deepened and straightened river valleys along the western slope of the Sierra Nevada, including Hetch Hetchy, Yosemite Valley, and Kings Canyon farther to the south. [12]
Less crowded than Yosemite Valley, whose roads have been choked with visitors, Hetch Hetchy Valley is a half-forgotten realm filled with granite walls, tall falls and wildflowers.
Tioga Pass Entrance Station. December 14, 1978 : Southwest of Lee Vining Yosemite National Park ... Hetch Hetchy Railroad Engine No.6. January 30, 1978
The Hetch Hetchy to Lake Vernon Trail in Yosemite starts from the parking lot close to the O'Shaughnessy Dam at the Hetch Hetchy Reservoir, and goes to Lake Vernon through the Yosemite Wilderness. Staying overnight requires a wilderness permit which can be obtained at the Hetch Hetchy ranger station or reserved online.
The mouth of Falls Creek on Hetch Hetchy Valley before flooding. Falls Creek begins at Dorothy Lake, which is located at one of the northernmost points in the national park. The headwaters, at nearly 10,000 feet (3,000 m) in elevation, lie between Forsyth Peak, Dorothy Lake Pass, Bond Pass and Bigelow Peak.
O'Shaughnessy Dam is a 430-foot-high (131 m) concrete arch-gravity dam in Tuolumne County, California, United States.It impounds the Tuolumne River, forming the Hetch Hetchy Reservoir at the lower end of Hetch Hetchy Valley in Yosemite National Park, about 160 miles (260 km) east of San Francisco. [6]
Smith Peak, in Yosemite National Park in the United States, overlooks the Hetch Hetchy Reservoir and provides grand vistas of the Hetch Hetchy Valley and surrounding wilderness. It is named for a sheep owner who claimed to own the Hetch Hetchy Valley and used it as a summer pasture.
Wapama Falls is the larger of two waterfalls located on Falls Creek on the northern wall of Hetch Hetchy Valley below Hetch Hetchy Dome, in Yosemite National Park. The other waterfall, Tueeulala Falls, is on a separate seasonal distributary of Falls Creek. Wapama Falls flows year-round and during peak flow has been known to inundate the trail ...