Snowgrass Mountain is a 7,999-foot (2,438-metre) mountain summit located in Chelan County of Washington state.[5] 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 which are a subrange of the Cascade Range.[2] The nearest higher neighbor is Big Chiwaukum, 1.23 mi (1.98 km) to the north.[2] Precipitation runoff from Snowgrass drains into tributaries of the Wenatchee River.
| Snowgrass Mountain | |
|---|---|
 Snowgrass Mountain | |
| Highest point | |
| Elevation | 7,999 ft (2,438 m)[1] |
| Prominence | 445 ft (136 m)[1] |
| Parent peak | Big Chiwaukum (8,098 ft)[1] |
| Isolation | 1.28 mi (2.06 km)[1] |
| Coordinates | 47°41′02″N 120°55′58″W / 47.683861°N 120.932759°W[2] |
| Geography | |
  Snowgrass Mountain Location in Washington  Snowgrass Mountain Location in the United States | |
| Country | United States |
| State | Washington |
| County | Chelan |
| Protected area | Alpine Lakes Wilderness |
| Parent range | Chiwaukum Mountains Wenatchee Mountains Cascade Range |
| Topo map | USGS Chiwaukum Mountains |
| Geology | |
| Rock age | Late Cretaceous[3] |
| Rock type | Schist[3] |
| Climbing | |
| First ascent | 1914[4] |
| Easiest route | Scrambling |
Climate
editMost weather fronts originating in the Pacific Ocean travel east toward the Cascade Mountains. As fronts approach, 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 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
editThe 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.[6] 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.[7] During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.[8] 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.[8] 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
edit
Gallery
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Snowgrass Mountain -
South-southeast aspect at sunrise -
South-southeast aspect
References
edit- ^ a b c d "Snowgrass Mountain - 7,999' WA". listsofjohn.com. Retrieved 2024-04-07.
- ^ a b c "Snowgrass Mountain, Washington". Peakbagger.com.
- ^ a b Geologic map of the North Cascade Range, Washington, Haugerud, R.A., and Tabor, R.W., US Geological Survey, 2009.
- ^ Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
- ^ "Snowgrass Mountain". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2019-04-12.
- ^ Smoot, Jeff (2004). Backpacking Washington's Alpine Lakes Wilderness. Helena, Montana: The Globe Pequot Press.
- ^ "GEOLOGIC MAP OF THE CHELAN 30-MINUTE BY 60-MINUTE QUADRANGLE, WASHINGTON" (PDF). United States Geological Survey. Retrieved 2018-06-15.
- ^ a b Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.
External links
edit- Weather forecast: Snowgrass Mountain
- Alpine Lakes Wilderness (Okanogan-Wenatchee National Forest) U.S. Forest Service