Sheep Mountain (Snohomish County, Washington)

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Sheep Mountain
Sheep Mountain 6166'.jpg
Sheep Mountain from northwest
Highest point
Elevation 6,166 ft (1,879 m) [1]
Prominence 1,126 ft (343 m) [1]
Isolation 1.92 mi (3.09 km) [2]
Coordinates 48°01′30″N121°25′05″W / 48.024873°N 121.418144°W / 48.024873; -121.418144 [1]
Geography
USA Washington relief location map.jpg
Red triangle with thick white border.svg
Sheep Mountain
Location in Washington
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Sheep Mountain
Sheep Mountain (the United States)
CountryUnited States
State Washington
County Snohomish
Protected area Henry M. Jackson Wilderness
Parent range Cascade Range
Topo map USGS Bedal
Climbing
Easiest route Scrambling

Sheep Mountain is a 6,166-foot-elevation (1,879-meter) summit near the western edge of the North Cascades, in Snohomish County of Washington state. [3] It is located one mile east of Barlow Pass along the Mountain Loop Highway near the Monte Cristo area. It is situated on land administered by the Mount Baker-Snoqualmie National Forest. Back in the old mining days of the late 1800s, the long sub-range stretching from Cadet Peak to Sheep Mountain was known as Pride of the Mountains Range. [4] Precipitation runoff from the mountain drains into tributaries of the Sauk River.

Contents

Climate

Sheep Mountain is located in the marine west coast climate zone of western North America. [4] Most weather fronts originating in the Pacific Ocean travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. [4] Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger. [4] 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. [4] Due to its temperate climate and proximity to the Pacific Ocean, areas west of the Cascade Crest very rarely experience temperatures below 0 °F (−18 °C) or above 80 °F (27 °C). [4] 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. [5] With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted. [5] In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago. [5]

During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris. [5] The U-shaped cross section of the river valleys is 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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References

  1. 1 2 3 "Sheep Mountain, Washington". Peakbagger.com.
  2. "Sheep Mountain WA - 6,166'". Lists of John. Retrieved 2021-04-10.
  3. "Sheep Mountain". Geographic Names Information System . United States Geological Survey, United States Department of the Interior . Retrieved 2021-04-10.
  4. 1 2 3 4 5 6 Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
  5. 1 2 3 4 Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.