Sofa Mountain is a 2,515-meter (8,251-foot) summit located in

Waterton Lakes National Park Waterton Lakes National Park is a national park located in the southwest corner of Alberta, Canada. It borders Glacier National Park in Montana, United States. Waterton was the fourth Canadian national park, formed in 1895 and named after Waterto ...

, in

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

. It is part of the

Lewis Range The Lewis Range is a mountain range located in the Rocky Mountains of northern Montana, United States and extreme southern Alberta, Canada. It was formed as a result of the Lewis Overthrust, a geologic thrust fault resulted in the overlying of y ...

which is a subset of the

Canadian Rockies The Canadian Rockies (french: Rocheuses canadiennes) or Canadian Rocky Mountains, comprising both the Alberta Rockies and the British Columbian Rockies, is the Canadian segment of the North American Rocky Mountains. It is the easternmost part ...

, and is the easternmost mountain in the Canadian Rockies, as well as the park. It is situated east of

Vimy Peak Vimy Peak is a summit located in Waterton Lakes National Park, in the Canadian Rockies of Alberta, Canada. It is set along the east shore of Waterton Lake on the opposite side from Waterton Park townsite. It is situated 5.4 km (3.4 mi) west of ...

, and the nearest higher neighbor is Crypt Peak, to the southwest.

Topographic relief Terrain or relief (also topographical relief) involves the vertical and horizontal dimensions of land surface. The term bathymetry is used to describe underwater relief, while hypsometry studies terrain relative to sea level. The Latin word ...

is significant as the north aspect rises over 1,220 meters (4,000 feet) above Middle Waterton Lake in approximately six kilometers (3.7 mi).

History

The mountain was named in 1865 by

Kootenay Brown John George Brown (10 October 1839 – 18 July 1916), better known as "Kootenai" Brown, was an Irish-born Canadian polymath, soldier, trader and conservation advocate. Early life John George Brown was born and educated in Ennistymon, County Clar ...

who wrote: "Coming down from the mountain, where we got our first glimpse of the buffalo, we soon reached the prairie shore of a large lake at the further side of which a mountain rose to a sofa-like peak among the clouds. This mountain was afterwards called Sofa Mountain."Dave Birrell, ''50 Roadside Panoramas in the Canadian Rockies'', Rocky Mountain Books, 2000, , page 151. This mountain's name was officially adopted in 1943 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 Canada ...

Geology

Like other mountains in Waterton Lakes National Park, Sofa Mountain is composed of

sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

laid down during the

Precambrian The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the ...

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

periods. Formed in shallow seas, this sedimentary rock was initially uplifted beginning 170 million years ago when the

Lewis Overthrust The Lewis Overthrust is a geologic thrust fault structure of the Rocky Mountains found within the bordering national parks of Glacier in Montana, United States and Waterton Lakes in Alberta, Canada. The structure was created due to the collision of ...

fault pushed an enormous slab of

precambrian The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the ...

rocks thick, wide and long over younger rock of the

cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

period.

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 ...

, Sofa Mountain has an alpine

subarctic climate The subarctic climate (also called subpolar climate, or boreal climate) is a climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, ge ...

with cold, snowy winters, and mild summers. Temperatures can drop below −20 °C with wind chill factors below −30 °C. 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 Sofa Mountain drains to the Waterton River and

Belly River Belly River is a river in northwest Montana, United States and southern Alberta, Canada. It is a tributary of the Oldman River, itself a tributary of the South Saskatchewan River. The name of the river may come from the Blackfoot word of , meanin ...

References

External links

* Parks Canada web site
Waterton Lakes National Park
* Weather forecast
Sofa Mountain
{{Canadian Rockies, state=collapsed Two-thousanders of Alberta Waterton Lakes National Park Alberta's Rockies

History

Geology

Climate

See also

References

External links