Icy Peak

Icy Peak is a 7,073-foot (2,156-metre) Skagit Range mountain summit located in the North Cascades of Washington state. It is situated in North Cascades National Park at the head of Nooksack Cirque. High ridges connect it to Seahpo Peak and Mount Shuksan. An icefall occupies the northeast cirque, and small glaciers clad all sides of the peak. Precipitation runoff drains into the Nooksack and Baker Rivers.

Icy Peak
Icy Peak seen from Ruth Mountain
Highest point
Elevation7,073 ft (2,156 m) [1]
Prominence1,315 ft (401 m) [1]
Parent peakSeahpo Peak (7,441 ft)[2]
Isolation1.54 mi (2.48 km) [2]
Coordinates48°50′08″N 121°31′32″W [1]
Geography
Icy Peak
Location in Washington
Icy Peak
Icy Peak (the United States)
Location
Parent rangeNorth Cascades
Topo mapUSGS Mount Shuksan
Climbing
Easiest routeClimbing, class 4, Glacier travel

Climate

Icy Peak is located in the marine west coast climate zone of western North America.[3] Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snowfall onto the Cascades (Orographic lift). As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer.[3] Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger.[3] The months July through September offer the most favorable weather for viewing or climbing this peak.

Geology

The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks, ridges, and deep glacial valleys. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences. These climate differences lead to vegetation variety defining the ecoregions in this area.

The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch.[4] With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted.[4] In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.[4]

During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.[4] The "U"-shaped cross section of the river valleys are a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.

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See also

References
  1. "Icy Peak, Washington". Peakbagger.com.
  2. "Icy Peak - 7,073' WA". listsofjohn.com. Retrieved 2020-07-25.
  3. Beckey, Fred W. (2008). Cascade Alpine Guide, Vol. 3, Rainy Pass to Fraser River (3rd ed.). Mountaineers Books. ISBN 978-1-59485-136-0.
  4. Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.
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