|Other names||Mountains of Shadow|
|Inhabitants||Noldor, Sindar, Edain|
A line of hills to the southwest formed the southern boundary of Nevrast. In the south, it was an east-west range that divided Dor-lómin and Mithrim to the north from Beleriand to the south, then in the east it curved around to the northwest, forming the boundary of Hithlum and separating it from Anfauglith. The Mountains of Mithrim were a northwesterly spur that separated Dor-lómin from Mithrim.
The Ered Wethrin disappeared beneath the waves at the end of the First Age.
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Coming of the Elves and the Captivity of Melkor"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Map of Beleriand and the Lands to the North"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Appendix: Elements in Quenya and Sindarin Names", entry orod
- J.R.R. Tolkien, "Words, Phrases and Passages in Various Tongues in The Lord of the Rings: Eldarin Roots and Stems", in Parma Eldalamberon XVII (edited by Christopher Gilson), p. 43