Mount Deception (Washington)
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Mount Deception is a peak in the
Olympic Mountains The Olympic Mountains are a mountain range on the Olympic Peninsula of the Pacific Northwest of the United States. The mountains, part of the Pacific Coast Ranges, are not especially high – Mount Olympus is the highest at ; however, the easte ...
of Cascadia. It is in
Olympic National Park Olympic National Park is a United States national park located in the State of Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west-side temperate rainforest, and the forests of the drier ...
on the
Olympic Peninsula The Olympic Peninsula is a large arm of land in western Washington that lies across Puget Sound from Seattle, and contains Olympic National Park. It is bounded on the west by the Pacific Ocean, the north by the Strait of Juan de Fuca, and th ...
in the
U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...
of
Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...
.


Description

At high Mount Deception is the second highest peak of the Olympic Mountains, after
Mount Olympus Mount Olympus (; el, Όλυμπος, Ólympos, also , ) is the highest mountain in Greece. It is part of the Olympus massif near the Thermaic Gulf of the Aegean Sea, located in the Olympus Range on the border between Thessaly and Macedonia, be ...
. It is the highest peak of the eastern Olympics. Mount Deception's
prominence In topography, prominence (also referred to as autonomous height, relative height, and shoulder drop in US English, and drop or relative height in British English) measures the height of a mountain or hill's summit relative to the lowest contou ...
is , making it the 17th most prominent peak in Washington. Its nearest higher peak is Mount Olympus at to the west. Mount Deception is located in the northeast portion of the Olympics Mountains just northeast of Mount Mystery between Deception Creek and Royal Creek. The region is known as Royal Basin and includes the upper reaches of Royal Creek. Mount Deception lies at the head of Royal Basin. This location puts it in the rain shadow of the Olympics, resulting in far less precipitation than Mount Olympus and the western Olympics receive. Although Mount Deception is the highest peak in the eastern Olympics, it is not visible from
Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest regio ...
. Radiating northward from the shoulders of Mount Deception are Gilhooley Tower,
The Needles The Needles is a row of three stacks of chalk that rise about out of the sea off the western extremity of the Isle of Wight in the English Channel, United Kingdom, close to Alum Bay and Scratchell's Bay, and part of Totland, the westernmo ...
, Mount Clark (), Mount Walkinshaw (), and the northeasterly running spur known as Gray Wolf Ridge. To the east and south are
Mount Fricaba Mount Fricaba is a double summit mountain located in the Olympic Mountains, in Jefferson County of Washington state. It is situated on the shared border of Olympic National Park with Buckhorn Wilderness, and is the highest point in that wilder ...
, Hal Foss Peak, Mount Mystery, and Little Mystery. Two small
glacier A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...
s hug the mountain's north-facing
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90 ...
slopes.
USGS The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, a ...
topographic maps
Mount Deception sits on the boundary between the
drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...
s of the
Dungeness River The Dungeness River is a long river located in the Olympic Peninsula in the U.S. state of Washington. It rises near Mount Constance in the Olympic Mountains within the Olympic National Park, flows through the Buckhorn Wilderness, passes by the ...
, to the north, and the Dosewallips River, to the south and east. Deception Creek, a tributary of the Dosewallips River, drains the southern slope of Mount Deception. Gray Wolf Pass is located about west of Mount Deception. The pass connects the Dungeness and Dosewallips drainage basins.


History

Mount Deception had been given the name Mount Holmes by the Seattle Press Expedition in honor of John H. Holmes of the '' Boston Herald''. Later, G.A. Whitehead of the U.S. Forest Service renamed it Mount Deception due to the difficulty mountaineers had in locating climbing routes on the often cloud-covered peak.


Recreation

Unlike the peaks of Gray Wolf Ridge, which are scalable for fit and determined day hikers, mountaineering skills are necessary for Mount Deception itself. While not a particularly technical climb, it is steep and exposed. If a climber falls and does not arrest immediately, loose rock and rotten snow may make it difficult to stop falling for some distance. Fatalities have occurred on Mount Deception and the National Park Service recommends climbers be experienced in self-arrest skills, rock climbing, and route-finding. The adjacent Needles are typically regarded as providing better, and somewhat more difficult, mountaineering objectives in the Royal Basin area.


Climate

Based on the
Köppen climate classification The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notabl ...
, Mount Deception is located in the
marine west coast An oceanic climate, also known as a marine climate, is the humid temperate climate sub-type in Köppen classification ''Cfb'', typical of west coasts in higher middle latitudes of continents, generally featuring cool summers and mild winters ...
climate zone of western North America. Most
weather front A weather front is a boundary separating air masses for which several characteristics differ, such as air density, wind, temperature, and humidity. Disturbed and unstable weather due to these differences often arises along the boundary. For in ...
s originate in the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the contin ...
, and travel northeast toward the
Olympic Mountains The Olympic Mountains are a mountain range on the Olympic Peninsula of the Pacific Northwest of the United States. The mountains, part of the Pacific Coast Ranges, are not especially high – Mount Olympus is the highest at ; however, the easte ...
. As fronts approach, they are forced upward by the peaks of the Olympic Range, causing them to drop their moisture in the form of rain or snowfall (
Orographic lift Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and cr ...
). As a result, the Olympics experience high precipitation, especially during the winter months. 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. In terms of favorable weather, the best months for climbing are June through September.


Geology

The Olympic Mountains are composed of obducted clastic wedge material and oceanic crust, primarily
Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...
sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...
,
turbidite A turbidite is the geologic deposit of a turbidity current, which is a type of amalgamation of fluidal and sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean. Sequencing Turbidites wer ...
, and
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90 ...
ic oceanic crust. The mountains were sculpted during the
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in ...
era by erosion caused by glaciers advancing and retreating multiple times.


See also

*
Olympic Mountains The Olympic Mountains are a mountain range on the Olympic Peninsula of the Pacific Northwest of the United States. The mountains, part of the Pacific Coast Ranges, are not especially high – Mount Olympus is the highest at ; however, the easte ...
*
Geology of the Pacific Northwest The geology of the Pacific Northwest includes the composition (including rock, minerals, and soils), structure, physical properties and the processes that shape the Pacific Northwest region of North America. The region is part of the Ring of F ...
* Geography of Washington (state) * List of mountains of the United States *
List of mountains by elevation A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby unio ...


References


External links

* * * Mount Deception weather
Mountain Forecast
* Mt. Deception photo
Flickr
{{DEFAULTSORT:Deception, Mount Mountains of Washington (state) Olympic Mountains Mountains of Jefferson County, Washington Landforms of Olympic National Park