The Northern Isles are islands in the northern seas, known for their frigid and inclement weather. They are probably located near the Land of Ice and Snow.
Gorath the Flame and his grandparents were stranded here after attempting to sail south. While there, the badgers farmed the land. Later Gorath was taken prisoner by Vizka Longtooth and his grandparents killed.
The Northern Isles appear in Eulalia!.