Snowgrass Mountain
Snowgrass Mountain
Highest point
Elevation7,993 ft (2,436 m)[1]
Prominence393 ft (120 m)[1]
Parent peakBig Chiwaukum (8,081 ft)[2]
Isolation1.34 mi (2.16 km)[2]
Coordinates47°41′02″N 120°55′58″W / 47.683861°N 120.932759°W / 47.683861; -120.932759[1]
Geography
Snowgrass Mountain is located in Washington (state)
Snowgrass Mountain
Snowgrass Mountain
Location in Washington
Snowgrass Mountain is located in the United States
Snowgrass Mountain
Snowgrass Mountain
Location in the United States
LocationChelan County
Washington state, U.S.
Parent rangeChiwaukum Mountains
Wenatchee Mountains
Cascade Range
Topo mapUSGS Chiwaukum Mountains
Geology
Type of rockSchist
Climbing
First ascent1914[3]
Easiest routeScrambling

Snowgrass Mountain is a 7,993-foot (2,436-metre) mountain summit located in Chelan County of Washington state.[4] Snowgrass Mountain is situated northeast of Frosty Pass and within the Alpine Lakes Wilderness. Snowgrass Mountain is the second-highest peak in the Chiwaukum Mountains, a subset of the Cascade Range. Its nearest higher peak is Big Chiwaukum, 1.23 mi (1.98 km) to the north.[1] Precipitation runoff from Snowgrass drains into tributaries of the Wenatchee River.

Climate

Most weather fronts originate in the Pacific Ocean, and travel east toward the Cascade Mountains. As fronts approach, 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 Cascades experience 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.

Geology

Snowgrass Mountain

The Alpine Lakes Wilderness features some of the most rugged topography in the Cascade Range with craggy peaks and ridges, deep glacial valleys, and granite walls spotted with over 700 mountain lakes.[5] Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences.

Snowgrass Mountain is composed of schist, part of the Nason terrane laid down 210 million years ago.[6] During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.[7] The last glacial retreat in the Alpine Lakes area began about 14,000 years ago and was north of the Canada–US border by 10,000 years ago.[7] The U-shaped cross section of the river valleys is a result of that 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 Alpine Lakes Wilderness area.

See also

References

  1. 1 2 3 4 "Snowgrass Mountain, Washington". Peakbagger.com.
  2. 1 2 "Snowgrass Mountain - 7,993' WA". listsofjohn.com. Retrieved 2020-06-23.
  3. ↑ Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
  4. ↑ "Snowgrass Mountain". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2019-04-12.
  5. ↑ Smoot, Jeff (2004). Backpacking Washington's Alpine Lakes Wilderness. Helena, Montana: The Globe Pequot Press.
  6. ↑ "GEOLOGIC MAP OF THE CHELAN 30-MINUTE BY 60-MINUTE QUADRANGLE, WASHINGTON" (PDF). United States Geological Survey. Retrieved 2018-06-15.
  7. 1 2 Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.
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