Imogene Lake is an

alpine lake An alpine lake is a high-altitude lake in a mountainous area, usually near or above the tree line, with extended periods of ice#On lakes, ice cover. These lakes are commonly glacial lakes formed from glacial activity (either current or in the pas ...

in Custer County,

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United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

, located in the Sawtooth Mountains in the Sawtooth National Recreation Area. The lake is approximately southwest of Stanley. The lake can be accessed from State Highway 75 in the Sawtooth Valley. There is a trailhead downstream of Hell Roaring Lake at the end of Sawtooth National Forest road 097, which is a high clearance road.Sawtooth National Forest. “Sawtooth National Forest” ap1:126,720, 1”=2 miles. Twin Falls, Idaho: Sawtooth National Forest, United States Forest Service, 1998. There is another trailhead about two miles further downstream along forest road 210 for those who cannot drive road 097 as well as horses. Hell Roaring Lake is in the Sawtooth Wilderness and wilderness permit can be obtained at trailheads. There are about three (depending on water levels) very small islands in the lake, the largest of which is less than long. Several other small lakes surround Imogene Lake, while Hell Roaring Lake is downstream, Mushroom Lake is upstream, and Edith Lake over the ridge to the south of Imogene.

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