The Alasre Mountains run below Arkene, and all the way to Voltar. Because of the length they run, they range in climate between mild and frigid. For the most part, these steep terrains are rocky and dangerous, a difficult place to survive in. No humans reside here other than nomads passing through or the occasional bandit.
Spoiler
https://postimg.org/image/rex55pmjb/
I cropped the image slightly.