Ptarmigan Glacier is located on north slopes of Glacier Peak in the U.S. state of Washington.

[2] As is true with all the glaciers found on Glacier Peak, Ptarmigan Glacier is retreating.

[3] During the Little Ice Age, Ptarmigan Glacier extended down to an altitude of 4,444 ft (1,355 m) but aside from a small advance during the 1970s, has retreated significantly since the end of the Little Ice Age.

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