Frostfang

The Frostfang is a mountain chin in northern Westros, and spreading somewhat into southern Arnor. The Frostfang Mountains contain within them the lognlasting battleground of the Night's Watch, and the White Walkers, and it is for this reason that the northern, and southern approaches into the valley of Frostfang are blocked by two mighty walls and gaurded by the men of the Night's Watch. They are named for their jagged peaks. Wildlings are thought to know hidden valleys that can provide shelter when crossing the mountains.

Geography
The Frostfangs lies to the north east of the Wall, just of the Shadow Tower, separating the Lands of Always Winter to their west and the Haunted Forest to their east and its southern peaks and foothills extend into the North. One of the largest mountains in the range is called Forktop by the Night's Watch. The easiest way into the Frostfangs is to follow the Milkwater river to its source, but this path is very visible from the Fist of the First Men. Other paths into the Frostfangs include the Giant's Stair and the Skirling Pass, if it is clear

Frostfangs, jagged peaks eternally covered in snow, are cruel and inhospitable wilderness of stone and ice. However, the Frostfangs conceals a diverse series of wonders. Icy waterfalls plunge over sheer stone cliffs, mountain meadows are filled with grass and wildflowers, there are ravines so deep and black they seem to go all the way to hell, and bridges of natural stone span distances with only the sky to either side, It's been suggested that there exist hidden valleys in the Frostfangs that sustain small numbers of people yet not even wildlings dare live in the Frostfangs during the winter