The Canadian Rockies, I read, form part of the Canadian Cordillera, extending from the plains of Alberta in the east to the trench of British Columbia in the west, and comprise the most northerly section of a sublime mountain range the runs as far south as the border regions of Idaho and Montana in the United States. But don’t mistake the Canadian Rockies for the American Rockies: whereas the southern range is all stubborn gneiss and granite, the northern segments are suppl...