The Hithaeglir, or Misty Mountains, stretched from the Ered Engrin in the north down towards the Ered Nimrais in the south. They formed a great natural barrier between the east and west of Middle-earth.

At the end of the First Age, some of the remaining Noldor crossed the Ered Luin and headed east toward the Hithaeglir and Elrond built the settlement of Imladris, or Rivendell, at the source of the river Bruinen.