West Beleriand was the region of Beleriand facing Belegaer to the west with the coast of Falas and the havens of Brithombar and Eglarest and the seaward tower of Barad Nimras. To the north the Ered Wethrin separated Hithlum and Nevrast from the rest of Beleriand.
Rivers included Brithon and Nenning and the tributaries to Sirion, Narog (with Ginglith and Ringwil) and Teiglin (with Malduin and other minor rivers). Between Ginglith and Narog was the field of Tumhalad. The Ravines of Teiglin surrounded the Forest of Brethil.
Siding Sirion was the forested stripe of Nivrim, separated from the rest of Doriath by Sirion. Between Narog and Sirion lay Talath Dirnen, a part of the Realm of Nargothrond with the hill of Amon Rûdh. To that realm also belonged Taur-en-Faroth to the west of Narog.