The chief citadel of Maedhros was upon the Hill of Himring, the Ever-cold; and that was wide-shouldered, bare of trees, and flat upon its summit, surrounded by many lesser hills.
- The Silmarillion, Chapter 14
In ancient days, Himring was a tall hill upon which Maedhros built his chief fortress, from which he guarded the northeastern border region that became known as the March of Maedhros. After the War of Wrath, when the western lands were flooded, the plains about the hill of Himring were drowned and the top of the hill was all that remained. Left standing as an island, Himring lay off the northwest coast of Forlindon. Nothing remains of the fortress.