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Emmons Glacier is on the northeast flank of 
Mount Rainier
Mount Rainier (), indigenously known as Tahoma, Tacoma, Tacobet, or təqʷubəʔ, is a large active stratovolcano in the Cascade Range of the Pacific Northwest, located in Mount Rainier National Park about south-southeast of Seattle. With a ...
, in 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 ...
. At , it has the largest surface area of any glacier in the contiguous United States
The contiguous United States (officially the conterminous United States) consists of the 48 adjoining U.S. states and the Federal District of the United States of America. The term excludes the only two non-contiguous states, Alaska and Hawaii ...
. The glacier was named after the geologist Samuel Franklin Emmons
Samuel Franklin Emmons (March 29, 1841 – March 28, 1911) was an American geologist. He was born in Boston, Massachusetts. He graduated from Harvard University in 1861 and studied at the ''Ecole des Mines'' in Paris, France, from 1862 to 1 ...
after his involvement in a survey of Mount Rainier in 1870.
Starting at an elevation of over , the Emmons glacier flows down eastward. Near the Disappointment Cleaver at , the Emmons is joined by the Ingraham Glacier flowing to the south. The glaciers flow together and remain connected until they split up upon reaching the wedge of Little Tahoma Peak. As the Emmons flows northeast, the massive glacier descends until it reaches its rocky lower terminus at about in elevation.
In the 1930s, the glacier was found to be receding quickly. In 1963, however, a rock fall from Little Tahoma Peak covered the lower glacier with rock debris. The debris cover insulated the ice from melting. As a result of decreased melting, the glacier advanced rapidly in the early 1980s. That advance was continuing by 1992, but at a slower rate; ice beneath the rock debris was melting irregularly and forming a vast hummocky area. By 2003, the glacier was again retreating. "In the past few decades the glaciers n the American Westhave been receding, continuing a trend from the Little Ice Age."
Emmons Glacier is often used as a route (the Columbia Crest route) to climb to the summit of Mount Rainier. There is a Ranger Station at Camp Schurman that was established on the edge of the Steamboat Prow.
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
{{Authority control Glaciers of Mount Rainier Glaciers of Washington (state)