Jenny Lake in Grand Teton National Park, Wyoming Poster

"Jenny Lake in Grand Teton National Park, Wyoming" by Catherine Sherman. In the distance, a motorboat speeds across Jenny Lake near Cascade Canyon in Grand teton National Park in Wyoming. Jenny and Jackson Lakes are the only lakes in Grand Teton National Park where motorboats are permitted. Jenny Lake was formed about 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 is named after a Shoshone Indian woman who married an Englishman, Richard "Beaver Dick" Leigh in the 19th century.