{{short description|Mountain in Alberta/BC, Canada}} {{Infobox mountain | name= Mount Lefroy | image= Mt. Lefroy, Banff.jpg | image_caption= Mount Lefroy | elevation_m= 3423 | elevation_ref=<ref name=crdb/><ref name=otm>{{cite opentopomap|Mount Lefroy|51.36181|-116.28016|2023-07-23}}</ref> | prominence_m= 417 | prominence_ref=<ref name=bivouac>{{cite bivouac|name=Mount Lefroy|id= 1590|access-date= 2008-10-05}}</ref> | parent= Bow Range ← Park Ranges | listing = {{unbulleted list | Mountains of Alberta | Mountains of British Columbia}} | country= Canada | subdivision1_type= Provinces | subdivision1= {{enum|Alberta|British Columbia}} | part_type = Protected&nbsp;areas | part = {{unbulleted list|Banff National Park|Yoho National Park}} | map= Alberta#British Columbia#Canada | map_caption= Location on Alberta##Location in British Columbia##Location in Canada | label_position= left | mapframe = yes | mapframe-zoom = 8 | mapframe-caption = Interactive map of Mount Lefroy | coordinates= {{coord|51|21|44|N|116|16|47|W|type:mountain_scale:100000|format=dms|display=inline,title}} | coordinates_ref=<ref name=bcgnis>{{cite bcgnis|918|Mount Lefroy|access-date= 2012-08-08}}</ref> | topo_map= NTS {{Canada NTS Map Sheet|82|N|8}}<ref name=bcgnis/> | first_ascent= 1897<ref name=bivouac/> | easiest_route= West face (UIAA II)<ref name=crdb/> }}

'''Mount Lefroy''' is a mountain on the Continental Divide, at the border of Alberta and British Columbia in western Canada. The mountain is located on the eastern side of Abbot Pass which separates Lake Louise in Banff National Park from Lake O'Hara in Yoho National Park. Mount Victoria lies immediately on the western side of the pass.

The mountain was named by George M. Dawson in 1894 for Sir John Henry Lefroy (1817–1890), an astronomer who had travelled over {{convert|8800|km|mi|-1}} in Canada's north between 1842 and 1844 making meteorological and magnetic observations.<ref name=crdb>{{cite crdb | id=768 | name = Mount Lefroy |access-date=2019-08-17}}</ref>

The mountain is the site of the first fatal accident in modern mountaineering in Canada. In 1896 during a failed summit bid, Philip Stanley Abbot slipped on rocks after just coming off an icy section and plummeted down the rock face to his death.<ref name=crdb/>

The first successful ascent was made in 1897 by J. Norman Collie, Arthur Michael, H. Dixon; Charles Fay, Peter Sarbach, R. Vanderlip, C. Noyes, Charles Thompson, and H. Parker.<ref name=bivouac/>

A prominent painting by Canadian Group of 7 artist Lawren Harris, was painted at this site.<ref>{{cite web |url = http://agora.virtualmuseum.ca/edu/ViewLoitLo.do?method=preview&lang=EN&id=82 |title = Lawren S. Harris, Mt. Lefroy, 1930 |work = Art!Facts |publisher = McMichael Canadian Art Collection | year = 2006 |accessdate = 2010-08-11 |archive-url = https://archive.today/20130115142633/http://agora.virtualmuseum.ca/edu/ViewLoitLo.do?method=preview&lang=EN&id=82 |archive-date = 2013-01-15 |url-status = dead |df = ymd }}</ref> __NOTOC__ ==Geology== Mount Lefroy is composed of sedimentary rock laid down during the Cambrian period. Formed in shallow seas, this sedimentary rock was pushed east and over the top of younger rock during the Laramide orogeny.<ref name=gadd>{{cite book|title=Geology of the Rocky Mountains and Columbias |author=Gadd, Ben |year=2008}}</ref>

==Climate== Based on the Köppen climate classification, Mount Lefroy is located in a subarctic climate zone with cold, snowy winters, and mild summers.<ref name=Peel>{{cite journal | author = Peel, M. C. |author2=Finlayson, B. L. |author3=McMahon, T. A. | year = 2007 | title = Updated world map of the Köppen−Geiger climate classification | journal = Hydrol. Earth Syst. Sci. | volume = 11 |issue=5 | pages = 1633–1644 |doi=10.5194/hess-11-1633-2007 |doi-access=free |bibcode=2007HESS...11.1633P | issn = 1027-5606}}</ref> Winter temperatures can drop below −20&nbsp;°C with wind chill factors below −30&nbsp;°C.

==Gallery== <div style="max-width: 500px;"> <gallery mode=slideshow> File:Mt. Lefroy.jpg|North aspect, with The Mitre to left File:Above Lake Louise, Alberta, Canada.jpg|Northeast aspect File:Banff (14912254558).jpg|Mount Lefroy north aspect, and Victoria Glacier File:Mount Lefroy - James MacDonald.jpg|J. E. H. MacDonald, ''Mount Lefroy'' (1932), National Gallery of Canada, Ottawa File:Mount Lefroy from nw.jpg|Northwest aspect File:The base of The Mitre, Mt Lefroy and Mount Victoria - Flickr - aagay.jpg File:Fireweed in the Lake Louise Valley.jpg|Mt. Lefroy and Mt. Victoria (right) File:Mount Lefroy 3420 m.jpg </gallery></div>

==References== {{reflist}}

== External links == * Mount Lefroy weather: [https://www.mountain-forecast.com/peaks/Mount-Lefroy/forecasts/3420 Mountain Forecast] * Parks Canada web site: [https://www.pc.gc.ca/en/pn-np/ab/banff Banff National Park]

{{Canadian Rockies|state=collapsed}}

{{DEFAULTSORT:Lefroy, Mount}} Category:Bow Range Category:Mountains of Banff National Park Category:Mountains of Yoho National Park Category:Three-thousanders of Alberta Category:Three-thousanders of British Columbia Category:Borders of Alberta Category:Borders of British Columbia