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Udûn (valley)

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The name Udûn refers to more than one character, item or concept. For a list of other meanings, see Udûn (disambiguation).

Udûn was the deep valley in the northwest of Mordor, formed at the meeting of the Ered Lithui and the Ephel Dúath. Its northern entrance was guarded by the Morannon and its southern entrance was guarded by the Isenmouthe.[1]


  1. J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "Map of Rohan, Gondor, and Mordor"