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Jenny Lake
Mt Owen and Mt St John across Jenny Lake.jpg
Jenny Lake at the foot of Cascade Canyon
Location Grand Teton National Park, Teton County, Wyoming, US
Type Glacial Lake
Primary inflows Cascade Creek and String Lake
Primary outflows Cottonwood Creek
Basin countries United States
Max. length 2.2 mi (3.5 km)
Max. width 1.2 mi (1.9 km)
Surface area 1,191 acres (482 ha)
Max. depth 256 ft (78 m)
Surface elevation 6,783 ft (2,067 m)

Jenny Lake is located in Grand Teton National Park in the U.S. state of Wyoming. The lake was formed approximately 12,000 years ago by glaciers pushing rock debris which carved Cascade Canyon during the last glacial maximum, forming a terminal moraine which now impounds the lake. The lake is estimated to be 256 feet (78 m) deep and encompasses 1,191 acres (482 ha). Jenny Lake is considered to be a major focal point in Grand Teton National Park, with many hiking trails, scenic boat rides, and quick access to the major climbing routes onto the tallest peaks of the Teton Range.

Jenny Lake boat ride
Boat ride across Jenny Lake to Cascade Canyon

Jenny and Jackson Lakes are the only lakes in Grand Teton National Park where motorboats are permitted; both lakes have scenic tours available. A 2005 study of the water quality of the lakes in Grand Teton National Park indicated that all the lakes in the park were still considered pristine and that they had not been impacted by air or water pollution.

Jenny Lake is a starting point for many day and overnight hiking trips. The 7.1-mile (11.4 km) Jenny Lake Trail loops around the lake and is considered to be relatively easy due to the small altitude gain of 700 feet (210 m). However, the altitude increases rapidly once Cascade Canyon is entered.

Jenny Lake is named after a Shoshone Indian woman who married an Englishman, Richard "Beaver Dick" Leigh. Jenny, and their 6 children, died of Smallpox in 1876.

Jenny Lake in December
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