|Other names||Ered Nimrais|
|Location||Between Gondor and Rohan|
|Description||Tall, snow-capped mountains|
|Regions||Gondor and Rohan|
The White Mountains formed a mountain range that was the natural border between Gondor and Rohan. Its Sindarin name was Ered Nimrais, "Whitehorn Mountains". The mountains were named after the glaciers of their highest peaks. The range lied mostly East-West, but also had a northern section, which was separated from the main line of the Hithaeglir by the Gap of Rohan. Even at the southern latitude of Gondor and Rohan, the White Mountains bore snow in summer, suggesting they were extremely high. The range had no known passes. The Paths of the Dead passed under it, but only the most courageous (or foolhardy) ever ventured that route.
Its notable peaks included the Irensaga and Starkhorn. Between these two lies the Dwimorberg, entrance to the Paths of the Dead. At the eastern end, the city of Minas Tirith is carved into Mindolluin mountain. The Warning beacons of Gondor are placed on top of seven peaks in the range: Amon Dîn, Eilenach, Nardol, Erelas, Min-Rimmon, Calenhad and Halifirien. The northernmost point is the Thrihyrne.
Several rivers sprung from the White Mountains, among them the Adorn, the Deeping-stream, the Snowbourn and Mering Stream on the north side, and, on the south side, the Erui, the Ringló, theCiril, the Morthond and the Lefnui.
In the Second Age, the White Mountains were populated by a people related to the Dunlendings who had been servants of Sauron. They swore allegiance to Isildur, but betrayed him and were cursed: they became known as the Army of the Dead, of the paths Aragorn, Gimli, Legolas, and the rangers later took. Before the Dunlendings, the White Mountains had been home to the Púkel-Men or Drúedain.