Mount Dennis is a mountain summit located three kilometres south of

Field Field may refer to: Expanses of open ground * Field (agriculture), an area of land used for agricultural purposes * Airfield, an aerodrome that lacks the infrastructure of an airport * Battlefield * Lawn, an area of mowed grass * Meadow, a grass ...

Yoho National Park Yoho National Park ( ) is a National Parks of Canada, national park of Canada. It is located within the Canadian Rockies, Rocky Mountains along the western slope of the Continental Divide of the Americas in southeastern British Columbia, bordered ...

, in the

Park Ranges The Park Ranges, also known as the Main Ranges, are a group of mountain ranges in the Canadian Rockies of southeastern British Columbia and southwestern Alberta, Canada. It is one of the three main subranges and the most central of the Continenta ...

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

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 ...

. The nearest higher neighbor is

Mount Stephen Mount Stephen, , is a mountain located in the Kicking Horse River Valley of Yoho National Park, km east of Field, British Columbia, Canada. The mountain was named in 1886 for George Stephen, the first president of the Canadian Pacific Railw ...

, to the northeast, and

Mount Burgess Mount Burgess, , is a mountain in Yoho National Park and is part of the Canadian Rockies. It is located in the southwest buttress of Burgess Pass in the Emerald River and Kicking Horse River Valleys. History It was named in 1886 by astronomer Ot ...

is six kilometres north on the opposite side of the

Kicking Horse River The Kicking Horse River is in the Canadian Rockies of southeastern British Columbia, Canada. The river was named in 1858, when James Hector, a member of the Palliser Expedition, reported being kicked by his packhorse while exploring the river. Hec ...

valley. Mount Dennis has over of vertical relief above Highway 1, the

Trans-Canada Highway The Trans-Canada Highway ( French: ; abbreviated as the TCH or T-Can) is a transcontinental federal–provincial highway system that travels through all ten provinces of Canada, from the Pacific Ocean on the west coast to the Atlantic Ocean o ...

, which traverses the northwest foot of the mountain. 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 Mount Dennis drains into tributaries of the Kicking Horse River which in turn is a tributary of the

Columbia River The Columbia River (Upper Chinook: ' or '; Sahaptin: ''Nch’i-Wàna'' or ''Nchi wana''; Sinixt dialect'' '') is the largest river in the Pacific Northwest region of North America. The river rises in the Rocky Mountains of British Columbia, C ...

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History

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 the mountain was made in 1887 by

James J. McArthur James Joseph McArthur (9 May 1856 – 14 April 1925) was a Canadian surveyor and mountaineer who was the first to climb several peaks in the Canadian Rocky Mountains. Two mountains and a lake are named after him, and he gave names to various oth ...

of the Dominion Land Survey. The mountain was named in 1916 by Alexander MacKinnon Burgess for Lieutenant-Colonel

John Stoughton Dennis Lieutenant-Colonel John Stoughton Dennis (19 October 1820 – 7 July 1885) was a Canadian surveyor, militia officer, and civil servant, born in Kingston, Upper Canada. In 1866, Dennis led an ill-fated militia attack against the Fenians at ...

(1820–1885), a Canadian surveyor who proposed the

Dominion Land Survey The Dominion Land Survey (DLS; french: links=no, arpentage des terres fédérales, ATF) is the method used to divide most of Western Canada into one-square-mile (2.6 km2) sections for agricultural and other purposes. It is based on the layout ...

system in 1869. The mountain's toponym 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 ...

Geology

Mount Dennis 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 ...

, Mount Dennis 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. Winter temperatures can drop below −20 °C with wind chill factors below −30 °C. Weather conditions during winter make Mount Dennis one of the premier places in the Rockies for ice climbing.

Ice climbing routes

Ice climbing routes with

grades Grade most commonly refers to: * Grade (education), a measurement of a student's performance * Grade, the number of the year a student has reached in a given educational stage * Grade (slope), the steepness of a slope Grade or grading may also r ...

on Mount Dennis * ''Carlsberg Column'' - WI5 * ''Guinness Gully'' - WI4 * ''Pilsner Pillar'' - WI6 * ''Cascade Kronenbourg'' - WI6 * ''Last Call'' - WI3

References

External links