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|"Blue Mountain Dwarf Hold" by Rob Alexander|
|Other names||Ered Luin, Ered Lindon, Western Mountains, Mountains of Lune|
|Location||Between Ossiriand/Lindon and Eriador|
|Description||Boundary between Eriador and Lindon with Dwarf realms|
Newer halls in the Southern chain
|Gallery||Images of the Blue Mountains|
 Early history
In the early days of Arda after the fall of the Two Lamps, the Blue Mountains were formed as the Valar widened the Great Sea and thrust Middle-earth eastward to protect Valinor. The Blue Mountains lined up with the Grey Mountains of the southlands, forming the western wall of Arda. These two ranges lay parallel to the Red Mountains in the northeast and Yellow Mountains in the southeast that formed the eastern wall. At their northern end, a narrow gap separated the Blue Mountains from the Iron Mountains, which stretched across the entire north of Middle-earth.
Sometime during the Years of the Trees two Dwarven Fathers awoke under Mount Dolmed and founded the two westernmost houses of the Dwarves (the Firebeards and Broadbeams). They subsequently built two great city-states, Nogrod and Belegost.
In the First Age, the Blue Mountains were an unbroken line separating Eriador from Beleriand. Seven rivers flowed from its western side, and the land these rivers flowed through was known as Ossiriand. Later, when the Green-elves settled there, the land was called Lindon, and the mountains sometimes referred to as the Ered Lindon. Wandering Elves would also hunt in the Blue Mountains.
The Blue Mountains were ruined during the War of Wrath at the end of the First Age, and in the south central end of the range the sea broke through. The River Lhûn now flowed through the mountains to the Gulf of Lune. On the western side a small section of Lindon remained, and here the retreating Elves built the kingdom of Lindon, ruled by Ereinion Gil-galad, last High King of the Noldor.
The Dwarven cities of Nogrod and Belegost were also ruined when the mountains were broken, causing most of the Dwarves to migrate east to Khazad-dûm, leaving a remnant behind. However, there remained some Dwarves on the eastern side of the Blue Mountains in days afterwards.
 Third Age
It also became the new home for many of Durin's Folk who were exiled from their halls in Erebor by Smaug the Dragon who had driven them out. After the War of the Dwarves and Orcs, King Thráin II established his throne in the Southern range beyond the Shire (T.A. 2802) and later his son Thorin ruled after he went missing. During Thorin's reign, many of the wandering Longbeards joined him in his halls and they became prosperous in a fashion. However, Erebor was retaken from Smaug by Thorin and company in T.A. 2941, and it can be assumed most if not all of Durin's folk relocated there.
 Etymology and names
The Etymologies show Noldorin alternative names, Lhúnorodrim and Lhúndirien ("Blue Towers"), and also the Middle Quenya Lúnoronti, which is first used in a passage of the further development of The Fall of Númenor.
In the Second Age the Men of Middle-earth called Ered Luin the Western Mountains.
 Portrayal in adaptations
- The Blue Mountains form the location of a fight between Dwarves and Drogoth.
2007: The Lord of the Rings Online:
- The Blue Mountains appear as the game's westernmost region, Ered Luin. Ered Luin is the beginner's region for two of the game's races: Elves and Dwarves. The region's storyline is based around a conflict with a rogue clan of Dwarves called the Dourhands and a tribe of Goblins living in the winding valleys of a region called Rath Teraig. Ered Luin is home to the cities of Thorin's Hall and Duillond, but also contain smaller outposts such as Gondamon and Celondim. Ered Luin is also home to the hostile Dourhand cities of Kheledul and the excavation of a long-lost city named Sarnur.
- Although the Blue Mountains do not appear in the game, they are mentioned by the Dwarf Grof. He tells the player that the Blue Mountains are prosperous, but that they lately find more iron than gold.
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "V. The Ambarkanta: Of the Fashion of the World", pp. 238-239
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "IV. The First 'Silmarillion' Map: [Introduction]"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Quenta Silmarillion: Of the Sindar"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Of the Rings of Power and the Third Age"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The History of Galadriel and Celeborn", "Concerning Galadriel and Celeborn"
- ↑ 6.0 6.1 6.2 J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "Eriador, Arnor, and the Heirs of Isildur"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Third Age"
- ↑ J.R.R. Tolkien, "Words, Phrases and Passages in Various Tongues in The Lord of the Rings", in Parma Eldalamberon XVII (edited by Christopher Gilson), p. 66
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 370
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, "Part One: II. The Fall of Númenor, (iv) The further development of The Fall of Númenor", p. 30
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "VII. The Earliest Annals of Beleriand: Appendix: Old English version of the Annals of Beleriand made by Ælfwine or Eriol. Notes", p. 341
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "Aldarion and Erendis: The Mariner's Wife", "Notes"
- ↑ The Lord of the Rings: War in the North, Prologue