The Northern Mountains appear to be large and well-known mountains that are supposedly close to Clint City. It has been featured in some of the cards' bios. Most of the cards have immigranted from Clint City to the Northern Mountains, and vice-versa.
Little is known about the Northern Mountains, other than most of the cards have left Clint City to live there. According to the bio from some of the cards, it seems that the mountains are famous for their bears, which inhabit the mountains and for the snow that falls there. Also, according to Dwan's bio, there also seem to be yetis residing in the mountains.
Characters who have immigranted from and to the Northern Mountains...