Loch Eileen is a freshwater lakes located on the north slope of the Chiwaukum Mountains, in Chelan County, Washington.

[2] Loch Eileen sits on a highly glaciated and semibarren alpine basin, surrounded by heather and other wildflowers and a coniferous presence primarily larch pines.

The lakes were given names by Albert Hale Sylvester, a topographer for the United States Geological Survey working throughout the North Cascades National Park Complex around 1900,[4] named after female family and friends of Sylvester.

[5] Loche Eileen was named by Sylvester after the daughter of Forest Service Ranger Jason William.

[6] This Chelan County, Washington state location article is a stub.