Isosceles Peak 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 topographic terms acme, apex, peak (mountain peak), and zenith are synonymous. The term (mountain top) is generally used only for ...

located in

British Columbia British Columbia is the westernmost Provinces and territories of Canada, province of Canada. Situated in the Pacific Northwest between the Pacific Ocean and the Rocky Mountains, the province has a diverse geography, with rugged landscapes that ...

, Canada.

Description

Isosceles Peak is set within

Garibaldi Provincial Park Garibaldi Provincial Park, also called Garibaldi Park, is a wilderness park located on the coastal mainland of British Columbia, Canada, 70 kilometres (43.5 mi) north of Vancouver. It was established in 1920 and named a Class A Provincial ...

and is part of the

Garibaldi Ranges The Garibaldi Ranges are the next-to-southwesternmost subdivision of the Pacific Ranges of the Coast Mountains; only the North Shore Mountains are farther southwest. They lie between the valley formed by the pass between the Cheakamus River and ...

of the

Coast Mountains The Coast Mountains () are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the British Columbia Coast, Coast of British Columbia sout ...

. It is situated north of

Vancouver Vancouver is a major city in Western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous city in the province, the 2021 Canadian census recorded 662,248 people in the cit ...

and southeast of

Mount Carr Mount Carr is a mountain summit located in British Columbia, Canada. Description Mount Carr is set within Garibaldi Provincial Park and is part of the Garibaldi Ranges of the Coast Mountains. It is situated north of Vancouver and south-sout ...

, the nearest higher neighbor. Precipitation runoff and glacial

meltwater Meltwater (or melt water) is water released by the melting of snow or ice, including glaciers, glacial ice, tabular icebergs and ice shelf, ice shelves over oceans. Meltwater is often found during early spring (season), spring when snow packs a ...

from the south side of the peak drains into headwaters of

Pitt River The Pitt River in British Columbia, Canada is a large tributary of the Fraser River, entering it a few miles upstream from New Westminster and about 25 km ESE of Downtown Vancouver. The river, which begins in the Garibaldi Ranges of the Coa ...

, and the northern slope drains to Cheakamus Lake via Isosceles Creek.

Topographic relief Terrain (), alternatively relief or topographical relief, is the dimension and shape of a given surface of land. In physical geography, terrain is the lay of the land. This is usually expressed in terms of the elevation, slope, and orientati ...

is significant as the summit rises 1,700 meters (5,577 feet) above Pitt River in 4 kilometers (2.5 miles).

History

The

first ascent In mountaineering and climbing, a first ascent (abbreviated to FA in climbing guidebook, guide books), is the first successful documented climb to the top of a mountain or the top of a particular climbing route. Early 20th-century mountaineers a ...

of Isosceles Peak was made in August 1922 by

Don Munday Walter Alfred Don Munday (1890–1950) was a Canadian explorer, naturalist and mountaineer famous for his explorations of the Coast Mountains with his wife Phyllis, and especially for the exploration of the Waddington Range. Early life Don Munday ...

, his wife

Phyllis Munday Phyllis Beatrice Munday (née James; 24 September 1894 – 11 April 1990) was a Canadian mountaineer, explorer, naturalist and humanitarian. She was famed for being the first woman to reach the summit of Mount Robson (with Annette Buck) in ...

, Neal Carter, Harold O'Connor, and Clausen Thompson.Dick Culbert (1969), ''A Climber's Guide to the Coastal Ranges of British Columbia'', Alpine Club of Canada, p. 137Kathryn Bridge (2006), ''A Passion for Mountains: The Lives of Don and Phyllis Munday'', Rocky Mountain Books, , p. 92, 95, 224. The peak's descriptive name refers to its shape similar to an

isosceles triangle In geometry, an isosceles triangle () is a triangle that has two Edge (geometry), sides of equal length and two angles of equal measure. Sometimes it is specified as having ''exactly'' two sides of equal length, and sometimes as having ''at le ...

. The toponym was officially adopted September 2, 1930, by the

Geographical Names Board of Canada The Geographical Names Board of Canada (GNBC) is a national committee with a secretariat in Natural Resources Canada, part of the Government of Canada, which authorizes the names used and name changes on official federal government maps of Canad ...

Climate

Based on the

Köppen climate classification The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (te ...

, Isosceles Peak is located in the

marine west coast An oceanic climate, also known as a marine climate or maritime climate, is the temperate climate sub-type in Köppen classification represented as ''Cfb'', typical of west coasts in higher middle latitudes of continents, generally featuring co ...

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 ins ...

s originate in the Pacific Ocean, and travel east toward the Coast Mountains where they are forced upward by the range (

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 ...

), causing them to drop their moisture in the form of rain or snowfall. As a result, the Coast Mountains experience high precipitation, especially during the winter months in the form of snowfall. Winter temperatures can drop below −20 °C with wind chill factors below −30 °C. This climate supports the Isosceles Glacier on the northeast slope and unnamed glaciers surrounding the peak.

References

External links

* Isosceles Peak
Weather forecast
{{Pacific Ranges Garibaldi Ranges Two-thousanders of British Columbia Sea-to-Sky Corridor New Westminster Land District

Description

History

Climate

See also

References

External links