Cool Glacier is located on east slopes of Glacier Peak in the U.S. state of Washington.

[3] Cool Glacier retreated approximately 1,500 m (4,900 ft) between 1850 and 1946, however during a cooler and wetter period from about 1950 to 1979, the glacier advanced.

Since then Cool Glacier resumed retreating and by 2005 the glacier was within 40 m (130 ft) of its minimum length recorded in 1946.

[4] The Cool Glacier was given its name in 1906 by mountaineer Claude Ewing Rusk for his climbing companion A.L.

This article about a glacier in Washington is a stub.