Mount Ratz is a mountain located just west of the Stikine River, about 5 km east of the British Columbia-Alaska border. It is the highest peak in the Stikine Icecap and of the Boundary Ranges which in turn form part of the Coast Mountains. It is an extremely high-prominence summit, with a difference in elevation with its "key col" at Hyland Ranch Pass of 2430 m. Thus making it one of Canada's Ultra peaks. Mount Ratz is named for William Francis Ratz, Dominion Land Surveyor and engineer-in-charge of surveying the Taku, Whiting and Stikine Rivers, who died on February 6, 1909. Report of the Chief Astronomer to the Deputy Minister of the Interior, Canada, for the year ending March 31, 1909, p.17; republished in Report of the International Boundary Commission, 1952, footnote p.79.