Boston Glacier

Boston Glacier
Boston Glacier below Forbidden Peak
Map showing the location of Boston Glacier
Map showing the location of Boston Glacier
Boston Glacier
Location in Washington
TypeMountain glacier
LocationNorth Cascades National Park, Skagit County, Washington, United States
Coordinates48°30′22″N 121°02′01″W / 48.50611°N 121.03361°W / 48.50611; -121.03361[1]
Length1 mi (1.6 km)
TerminusIcefall
StatusRetreating

Boston Glacier is located in a large cirque below several mountain peaks in North Cascades National Park in the U.S. state of Washington.[2] Approximately 1 mi (1.6 km) long but nearly 3.5 mi (5.6 km) wide, it is the largest glacier in North Cascades National Park.[3] Extending in an arc from the north of Forbidden Peak, it is flanked by Boston Peak to the southwest and Buckner Mountain at its eastern margin, between which it lies below the arête known as Ripsaw Ridge. Another arête extending between Boston Peak, Sharkfin Tower, Forbidden Peak and further north separate Boston Glacier from the nearly adjoining Quien Sabe and Forbidden Glaciers. Boston Glacier has been in an overall state of retreat since the end of the Little Ice Age around the year 1850. A moderate advance occurred between 1950 and the mid-1970s; however, the retreat resumed and between 1972 and 2006 its terminus retreated 1,470 ft (450 m).[4]

See also

References

  1. ^ "Boston Glacier". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved October 26, 2014.
  2. ^ Forbidden Peak, WA (Map). TopoQwest (United States Geological Survey Maps). Retrieved October 26, 2014.
  3. ^ Post, Austin; Don Richardson; Wendell V. Tangborn; F. L. Rosselot (1971). "Inventory of Glaciers in the North Cascades, Washington". United States Geological Survey. Archived from the original on October 18, 2012. Retrieved August 26, 2014.
  4. ^ Pelto, Mauri. "North Cascade Glacier Terminus Behavior". North Cascade Glacier Climate Project. Nichols College. Retrieved October 26, 2014.


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