Grand Teton National Park, USA, Jenny Lake by Jeroen van Deel

Grand Teton National Park is a national park in Wyoming in the United States, south of Yellowstone. The park is named after the Grand Teton, one of the mountains of the Teton Mountains, 4197 metres high and the highest mountain in the park. The park includes much of the valley below, the Jackson Hole. The Teton Mountains got their name from a French trapper, who called them tétons, French for nipple. The park covers an area of 1255 km² and has been a national park since 26 February 1929. There are almost 320 km of hiking trails in the park.

Jenny Lake is a lake in Grand Teton National Park in the US state of Wyoming, at the foot of the Cathedral Group of the Teton Mountains. The lake was named after the Shoshone wife of trapper Richard Beaver Dick Leigh. He was employed by an expedition that explored and put the region on the map in 1872. Jenny and her six children died of smallpox in 1876.

Jenny Lake was formed about 12 000 years ago by glaciers during the last Glacial Maximum that pushed debris ahead, forming the Cascade Canyon. The moraine held the water and thus the lake was formed.