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Mix-up Peak,[4] also known as Mixup Peak, is a 7,440-foot (2,270-metre) mountain summit located on the shared boundary of Skagit County and Chelan County in Washington state. It is part of the North Cascades Range and is situated one mile south of Cascade Pass on the shared border of North Cascades National Park and Glacier Peak Wilderness. The nearest higher peak is Magic Mountain, 1.02 miles (1.64 km) to the east-southeast.[1] Mix-up Peak is at the northern end of the Ptarmigan Traverse which is an alpine route to remote mountains such as Mount Formidable and Dome Peak. The Cache Glacier occupies a cirque below its eastern flank. Surface runoff on the east side the mountain drains into the Stehekin River, whereas precipitation runoff drains into the Cascade River from the west side.

Mix-up Peak
Mix-up Peak seen from Sahale Arm Trail
Highest point
Elevation	7,440 ft (2,270 m)[1]
Prominence	640 ft (200 m)[1]
Parent peak	Magic Mountain[2]
Isolation	1.03 mi (1.66 km)[2]
Coordinates	48°27′14″N 121°03′37″W[1]
Geography
Mix-up Peak Location in Washington Show map of Washington (state) Mix-up Peak Mix-up Peak (the United States) Show map of the United States
Location	Washington, U.S.
Parent range	North Cascades
Topo map	USGS Cascade Pass
Climbing
First ascent	1947, Wesley Grande, Jack Kendrick[3]
Easiest route	Glacier travel, class 4 scrambling[2]

Climate

Mix-up 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.[5] Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger.[5]

Geology

The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks and 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 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.

See also

• Geography of Washington (state)
• Geology of the Pacific Northwest

References

External links

• North Cascades National Park National Park Service
• Mix-up Peak weather: Mountain Forecast

На других языках

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[de] Mix-up Peak

Der Mix-up Peak,[3] (auch Mixup Peak geschrieben) ist ein Berg auf der Grenze der Countys Skagit und Chelan im US-Bundesstaat Washington. Er ist Teil der Nördlichen Kaskadenkette und liegt etwa 1 mi (1,6 km) südlich des Cascade Pass auf der Grenze zwischen dem North Cascades National Park und der Glacier Peak Wilderness. Der nächste höhere Berg ist der Magic Mountain, 1,02 mi (1,6 km) ostsüdöstlich.[1] Der Mix-up Peak liegt am nördlichen Ende der Ptarmigan Traverse, einer alpinen Wander- und Kletterroute zu so entlegenen Bergen wie dem Mount Formidable und dem Dome Peak. Der Cache-Col-Gletscher liegt in einem Kar unterhalb seiner östlichen Flanke. Der oberflächliche Abfluss an der Ostseite des Berges fließt in den Stehekin River, wohingegen die Niederschläge auf der Westseite in den Cascade River fließen.

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- [en] Mix-up Peak

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