Far to the north of the Shire - indeed, far to the north of Bree-land and the North Downs - lies a range of black, craggy mountains that bars passage from the North Downs into Angmar beyond. This range is called the Ram Dúath. Over the course of history it has served as a fortification of the Witch-king's realm, and as a cage in which to pen his servants after his defeat. The Rangers of the North keep an eye ever trained on the mouths of its passes, watching for trouble from the cursed lands beyond.
The passage through the Ram Dúath is maze-like and treacherous, a den to drakes and other fell creatures, as well as home to the strange Earth-kin, gentle giants who hunt the aurochs of the North Downs. Recently, armies out of Angmar have begun to descend through the Ram Dúath, threatening the North Downs and the rest of Eriador beyond.