Erôn-Durath; meaning "Castle of the Defenders" in elvish, is an ancient castle built long ago by the Ravinian Empire. The castle was destroyed in the terrible Battle of Harkalad.

The castle’s ruins lie along the Herthmar Road, in the present-day kingdom of Alveron, in a region known as the Amar Gap. The fields and meadows around the ruins are known as the "Hallowed Fields".