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Quien Sabe Glacier is a 
glacier
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its Ablation#Glaciology, ablation over many years, often Century, centuries. It acquires dis ...
located on the west slopes of Boston Peak, North Cascades National Park
North Cascades National Park is an American national park in the state of Washington. At more than , it is the largest of the three National Park Service units that comprise the North Cascades National Park Complex. North Cascades National Par ...
in the U.S. state
In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sover ...
of Washington
Washington commonly refers to:
* Washington (state), United States
* Washington, D.C., the capital of the United States
** A metonym for the federal government of the United States
** Washington metropolitan area, the metropolitan area centered o ...
. Quien Sabe Glacier retreated 1200 meters from its Little Ice Age
The Little Ice Age (LIA) was a period of regional cooling, particularly pronounced in the North Atlantic region. It was not a true ice age of global extent. The term was introduced into scientific literature by François E. Matthes in 1939. Ma ...
maximum in approximately 1850 to 1950. The glacier then advanced 55 meters between 1955 and 1975. It then started to retreat again and has retreated 200 meters from its largest extent in the 1970s to 2010. The glacier is approximately in length, in width at its terminus and descends from . The glacier is separated by ridges from Sahale Glacier to the south and the much larger Boston Glacier
Boston Glacier is located in a large cirque below several mountain peaks in North Cascades National Park in the U.S. state of Washington. Approximately long but nearly wide, it is the largest glacier in North Cascades National Park. Extending in ...
to the north.
See also
*List of glaciers in the United States
This is a list of glaciers existing in the United States, currently or in recent centuries. These glaciers are located in nine states, all in the Rocky Mountains or farther west. The southernmost named glacier among them is the Lilliput Glacier ...
References
Glaciers of the North Cascades Glaciers of Skagit County, Washington Glaciers of Washington (state) {{Washington-glacier-stub