I am not calling all of America’s Rocky Mountains the Northern Rockies. I reserve that description for the northern part of the Rocky Mountains in the United States (the Middle Rockies and Southern Rockies are also a thing). This has nothing to do with how people in Canada describe their own regions of the Rocky Mountains. The “Northern Rockies” on this blog are the Rocky Mountains in the states of Wyoming, Montana and Idaho, similar to the descriptions used by the National Parks Conservation Association (https://www.npca.org/regions/northern-rockies) and the National Park Service (https://www.nps.gov/articles/rockies.htm).