Destruction of the Iron Mountains

Not only were the seas changed during the Siege of Utumno, but also, the lands. The central highlands of Dorthonion and Hithlum were said to have been raised—specifically, the “Iron Mountains “were broken and distorted at their western end . . . made the Ered-wethrin and Eredlómin, and that the Iron Mountains bent back northward.’”


Both of these were creatures of Morgoth, and with the breaking of Thangorodrim, the most likely relocation for them would have been in any remaining portions of the Iron Mountains.


West of Dunharrow and south of Helm’s Deep, where the forces forming the east-west and the north-south ranges met, the land was heaved upward and tortuously twisted into a knot. There were probably some of the highest peaks in the known lands of Middle-earth (after the destruction of Thangorodrim and the Iron Mountains)—possibly even higher than those of the Alps.


-Fonstad, Karen Wynn. The Atlas Of Middle-Earth. HarperCollins. Kindle Edition.