Blue Mountain is a mountain

summit A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. The topography, topographic terms acme, apex, peak (mountain peak), and zenith are synonymous. The term (mountain top) is generally used ...

located within Olympic National Park in

Clallam County Clallam County is a county in the U.S. state of Washington. As of the 2020 census, the population was 77,155, with an estimated population of 78,209 in 2021. The county seat and largest city is Port Angeles; the county as a whole comprises the ...

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 on ...

state. Blue Mountain is situated in the

Daniel J. Evans Wilderness Daniel is a masculine given name and a surname of Hebrew origin. It means "God is my judge"Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 68. (cf. Gabriel—"God is my strength" ...

, 13 miles southeast of

Port Angeles Port Angeles ( ) is a city and county seat of Clallam County, Washington, United States. With a population of 19,960 as of the 2020 census, it is the largest city in the county. The population was estimated at 20,134 in 2021. The city's har ...

and 11 miles southwest of

Sequim Sequim ( ) is a city in Clallam County, Washington, United States. It is located along the Dungeness River near the base of the Olympic Mountains. The 2010 census counted a population of 6,606. Sequim lies within the rain shadow of the Olympic M ...

. Topographic relief is significant as the south aspect rises above Gray Wolf River in approximately 2.5 miles. The mountain's name is due to a soft, blue

haze Haze is traditionally an atmospheric phenomenon in which dust, smoke, and other dry particulates suspended in air obscure visibility and the clarity of the sky. The World Meteorological Organization manual of codes includes a classification ...

that forms around the mountain in the summer. New settlers to 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 the ...

near the end of the 19th century brought devastating fires started by land clearing and logging activities. The Dungeness Fire of 1891 burned about 30,000 acres, destroying much of the forest around Blue Mountain. Access is via the 19-mile Deer Park Road, and the summit can be reached by walking the half-mile Rain Shadow Loop Trail which gains 170 feet of elevation from road's end. The trail is so named because Blue Mountain lies within the

rain shadow A rain shadow is an area of significantly reduced rainfall behind a mountainous region, on the side facing away from prevailing winds, known as its leeward side. Evaporated moisture from water bodies (such as oceans and large lakes) is carrie ...

of 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 easter ...

, receiving 50 inches of precipitation annually compared to more than 200 inches on

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 ...

, 23 miles distant.Alan Leftridge, 2017, ''The Best of Olympic National Park'', Farcountry Press, Precipitation

runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market ...

from the mountain drains north to the Strait of Juan de Fuca via Maiden Creek, Siebert Creek, McDonald Creek, Canyon Creek, and Gray Wolf River. The summit offers a view of the

San Juan Islands The San Juan Islands are an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of ...

, Victoria across the strait on

Vancouver Island Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian Provinces and territories of Canada, province of British Columbia. The island is in length, in width at its widest point, and in total area, while are o ...

, Canada, and on a clear day the eye can see as far as

Mount Baker Mount Baker (Lummi: '; nok, Kw’eq Smaenit or '), also known as Koma Kulshan or simply Kulshan, is a active glacier-covered andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington in the United States. Mount ...

, 87 miles away. The endemic Olympic bellflower can be found near the summit.

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 ...

, Blue Mountain is located in the marine west coast climate zone of western

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

. Most weather fronts 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 continen ...

, and travel east toward the

. 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). 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.

Geology

The Olympic Mountains are composed of obducted

clastic Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus,Essentials of Geology, 3rd Ed, Stephen Marshak, p. G-3 chunks, and smaller grains of rock broken off other rocks ...

wedge material and oceanic crust, primarily

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

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, and

basalt Basalt (; ) is an aphanite, 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 planetary surface, surface of a terrestrial ...

ic oceanic crust. The mountains were sculpted during the

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), 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 fina ...

era by erosion and glaciers advancing and retreating multiple times.

Gallery

File:Blue Mountain summit Olympic mountains.jpeg, Summit vista, looking south File:Blue Mountain 5731.JPG, View of summit from Deer Park File:Blue Mountain, Olympic National Park.jpg, West aspect near sunset

References

External links

* * Deer Park Area Brochure
National Park Service
* Blue Mountain
Mountain-forecast.com
{{Commons category-inline Olympic Mountains Mountains of Washington (state) Mountains of Clallam County, Washington Landforms of Olympic National Park North American 1000 m summits

Climate

Geology

See also

Gallery

References

External links