The Sky Lakes Wilderness is made up of three separate basins that were defined by volcanic action and carved into shape by glaciers thousands of years ago and are currently home to more than 200 lakes. Twenty-seven miles long and six miles wide, the Sky Lakes Wilderness in Southern Oregon encompasses 113,590 acres within the Cascade Mountain Range and is crossed by the Pacific Crest National Scenic Trail from north to south. The northernmost basin is known as the Seven Lakes Basin, while the most southerly of the three bowls is the Blue Canyon Basin. With the exception of large Fourmile Lake at the south end, all of the lakes within the Sky Lakes Wilderness can only be reached via hiking trails as motorized vehicles are not permitted in the Wilderness.

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