What is the approximate line of latitude in degrees that the southern border of British Columbia, Alberta, Saskatchewan, and Manitoba lie on?

British Columbia, Alberta, Saskatchewan, and Manitoba are 4 states from Canada that are connected through their borders. Understanding that we need the approximate degree for the southern side of each of this states the logic way to find out is to look the latitude from one of the cities that are located in the south. Using Milk River as a reference, located in the south of Alberta, we can conclude that the southern border of each of this states is located at 49º N.