Portal Peak is a mountain summit located four kilometers west of Bow Lake in

Banff National Park Banff National Park is Canada's oldest National Parks of Canada, national park, established in 1885 as Rocky Mountains Park. Located in Alberta's Rockies, Alberta's Rocky Mountains, west of Calgary, Banff encompasses of mountainous terrain, wi ...

, in 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 ...

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 ...

. Its nearest higher peak is Mount Thompson, to the northwest. Portal Peak is situated east of the Wapta Icefield, and is a member of the Waputik Mountains. Portal Peak can be seen from the Icefields Parkway at Bow Lake.

History

Portal Peak was named in 1916 by Charles Sproull Thompson (1869-1921), who participated in numerous first ascents in the Canadian Rockies. In August 1897, Charles Thompson, Hugh Stutfield, and

J. Norman Collie Professor John Norman Collie FRSE FRS (10 September 1859 – 1 November 1942), commonly referred to as J. Norman Collie, was an English scientist, mountaineer and explorer. Life and work He was born in Alderley Edge, Cheshire, the second of ...

camped on the shores of Bow Lake; then proceeded to climb the Bow Glacier, which at that time descended farther down into the valley; then crossed the Wapta Icefield to attain the summit of

Mount Gordon Mount Gordon is a cinder cone in the Wrangell Mountains of eastern Alaska, United States, located between Nabesna Glacier and the stratovolcano Mount Drum. It is the most prominent of a group of Pleistocene and Holocene The Holocene ( ) is t ...

. Portal Peak flanks one side of Bow Glacier, which in 1897 was considered the portal to the Wapta Icefield. The mountain's name was officially adopted in 1924 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 ...

. The

first ascent In mountaineering, a first ascent (abbreviated to FA in guide books) is the first successful, documented attainment of the top of a mountain or the first to follow a particular climbing route. First mountain ascents are notable because they en ...

of Portal Peak was made in 1926 by D. Duncan and L. Hudson.

Geology

Portal Peak is an

overthrust A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. If ...

peak situated between the Bow Glacier and Peyto Glacier. Like other mountains in Banff Park, Portal Peak 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 pushed east and over the top of younger rock during the

Laramide orogeny The Laramide orogeny was a time period of mountain building in western North America, which started in the Late Cretaceous, 70 to 80 million years ago, and ended 35 to 55 million years ago. The exact duration and ages of beginning and end of the o ...

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 ...

, Portal Peak is located in a

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 ...

zone 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 Portal Peak drains into the Bow River which is a tributary of the Saskatchewan River. Bow Lake reflections (7897959788)

References

External links

* Weather forecast
Portal Peak
* Parks Canada web site
Banff National Park
* Portal Peak photo
Flickr
{{Canadian Rockies, state=collapsed Two-thousanders of Alberta Mountains of Banff National Park Canadian Rockies Alberta's Rockies

History

Geology

Climate

See also

References

External links