| Jumbo Mountain | |
|---|---|
 Jumbo Mountain seen from the north | |
| Highest point | |
| Elevation | 5,825 ft (1,775 m) [1] |
| Prominence | 1,765 ft (538 m) [1] |
| Parent peak | Three Fingers [1] |
| Isolation | 3.34 mi (5.38 km) [1] |
| Coordinates | 48°11′44″N 121°35′59″W / 48.195654°N 121.59959°W [2] |
| Geography | |
  Jumbo Mountain Location of Jumbo Mountain in Washington  Jumbo Mountain Jumbo Mountain (the United States) | |
| Country | United States |
| State | Washington |
| County | Snohomish |
| Protected area | Boulder River Wilderness |
| Parent range | Cascade Range |
| Topo map | USGS Helena Ridge |
| Geology | |
| Type of rock | Shale and Sandstone |
| Climbing | |
| Easiest route | Scrambling |
Jumbo Mountain
[3] is a 5,825-foot-elevation (1,775-meter)
summit near the western edge of the
North Cascades, in
Snohomish County of
Washington state. It is located four miles south of
Darrington, Washington, along the
Mountain Loop Highway. It is situated in the
Boulder River Wilderness on land administered by the
Mount Baker-Snoqualmie National Forest. The mountain was named by miners for its resemblance to an
elephant. The nearest higher peak is Buckeye Peak, 3.34 miles (5.38 km) to the west.
[2] Precipitation
runoff from Jumbo Mountain drains into tributaries of the
Stillaguamish River and
Sauk River.
Climate
Jumbo Mountain is located in the marine west coast climate zone of western North America. [4] Most weather fronts coming off 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 snow 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. [5] 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. [5] 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]
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. [6] With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted. [6] In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 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. [6] 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.
See also
References
- ^ a b c d "Jumbo Mountain WA - 5,825'". Lists of John. Retrieved 2024-04-07.
- ^ a b "Jumbo Mountain, Washington". Peakbagger.com.
- ^ Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
- ^ a b c Beckey, p. 15
- ^ a b Beckey, p. 16
- ^ a b c d Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.
External links
- Jumbo Mountain weather: Mountain Forecast