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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 is a Sindarin word that meant 'Hell'.[2]

Portrayal in adaptations

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 Cyrillic Удуна
Bengali উড়ুন
Bulgarian Cyrillic Удун
Chinese 烏頓
Danish Udûn ("Helvedesdalen")
Greek Οδον
Gujarati ઉડ્ડન
Hebrew אודון
Hindi उडुन
Kannada ಉಡುನ್
Marathi उडुन
Persian اودون
Punjabi ਉਡੁਨ
Russian Удун
Sinhalese උඩුන්
Tamil உடுந்
Tatar Удун
Telugu ఉదున్
Ukrainian Cyrillic Удун
Urdu اڈون
Uzbek Удун (Cyrillic) Udun (Latin)


  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