This article is about the region of Mordor. For the fortress with a related name, see Utumno.

The valley of Udûn as shown in The Atlas of Middle-earth

Udûn was a wide, depressed valley in northwestern Mordor. It lay between Cirith Gorgor and the Isenmouthe, and was traversed by large armies of Sauron in times of war.

Within its circumference were many Orc-holds, including Durthang, the forges, and the forts at Carach Angren.[1]


Udûn originated with the creation of the lands of Mordor. During both the War of the Last Alliance and the War of the Ring, the vast armies of Mordor passed through here and out the Black Gate to confront their enemies.[1][2]


Udûn meant "hell" in Sindarin.[2]

Portrayal in adaptations

Udûn (Mordor)

View of Sauron's army marching through Udûn to the Black Gates, as seen in Peter Jackson's The Lord of the Rings: The Return of the King

The Lord of the Rings film trilogy

Udûn appears in the third film of Peter Jackson's The Lord of the Rings film trilogy, while Frodo Baggins and Samwise Gamgee are traveling towards Mount Doom. The valley itself is depicted similarly to its description in J.R.R. Tolkien's works, though the apparent distances are altered in order for Barad-dûr to be visible from the Black Gate.

Middle-earth: Shadow of Mordor

In Middle-earth: Shadow of Mordor, following the Battle of Dagorlad, Udûn became populated by the Outcasts of Udûn, descendants of banished Gondorian criminals and slaves. They built a shanty town known as The Slabs in the eastern reaches of the valley. Upon Sauron's return to Mordor, the Outcasts were either enslaved or driven out of Udûn and their city was converted into Uruk's Hollow, a slave camp and home for Sauron's minions.


Foreign Language Translated name
Belarusian Удуна
Hebrew אודון ?
Russian Удун
Ukrainian Удун


  1. 1.0 1.1 The Atlas of Middle-earth, Regional Maps, "Mordor (and Adjacent Lands)"
  2. 2.0 2.1 The Complete Guide to Middle-earth
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