War of the Gods
The Grim Peaks rise from the earth like the jagged, broken teeth of an ancient dragon. Reaching the Peaks from the northern side of the Flat Top Mountains would take about two days of hard marching. The Peaks form a large east-west range and effectively serve as a barrier between the eastern lands and the northern tundra.
No one currently living in the east claims to know for sure what is beyond the Grim Peaks.