Cathedral Mountain is a 3,189-metre (10,463-foot) complex massif located six kilometres northwest of Lake O'Hara in Yoho National Park, in the Canadian Rockies of British Columbia, Canada.

Its shape and structure conjures up a resemblance to a gothic cathedral that has inspired many artists, including Group of Seven's Arthur Lismer, who painted it in 1928.

[2] To prevent damage to its operations, the Canadian Pacific Kansas City railway pumps overflow from Teacup Lake down the west face of Cathedral to minimize the subglacial lake's discharging in a phenomenon known as a jökulhlaup.

[4] The first ascent of Cathedral Mountain was made in 1901 by James Outram, with guides Joseph Bossoney, and Christian Klucker.

[3] Cathedral Mountain is composed of sedimentary rock laid down during the Precambrian to Cambrian periods.