Foss Glacier is within the Alpine Lakes Wilderness of Snoqualmie National Forest in the U.S. state of Washington and is on the northeast slope of Mount Hinman.

[2] Foss Glacier retreated almost 500 m (1,600 ft) between 1950 and 2005.

[3] Foss Glacier is separated from the nearly vanished Hinman Glacier to the west by a ridge.

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