|"Ered Mithrin" by Matěj Čadil|
|Other names||Ered Mithrin|
|Location||North-west of Erebor, north of Mirkwood|
|Description||A rich mountain range of many ores|
|Major towns||Dáin's Halls|
|People and History|
|Events||War of the Dwarves and Dragons, slaying of Scatha the Worm|
|Gallery||Images of the Grey Mountains|
North of the Grey Mountains lay the Northern Waste. In the west, where the Grey Mountains met with the Misty Mountains rose Mount Gundabad, an ancient Dwarven holy site and later the capital for the Orcs of the north. The eastern end of the Grey Mountains was split into two chains, and in between lay the Withered Heath, where Dragons bred. After that was a wide hilly plain, beyond which lay the Iron Hills. Erebor, the Lonely Mountain, lay south of the Grey Mountains.
 Early history
In the First Age, the Longbeards established mansions in Moria and the Iron Hills, and they considered the Grey Mountains, which lay between these mansions, to be within their territory. Some Men—mostly related to the House of Hador of Beleriand—settled between the Grey Mountains and Greenwood, and they allied with the Longbeards against Morgoth's Orcs.:302-303 This alliance ended in the Second Age after Sauron destroyed Eregion, which prompted the Longbeards to seal Moria. During this time, Orcs took control of the Grey Mountains.:305
 Third Age
Durin's folk started to gather in the Grey Mountains in T.A. 1981 after a Balrog was awakened in their ancestral home of Khazad-dûm, which its people fled in fear. Another portion of Durin's folk lead by King Thráin I established the Kingdom under the Mountain founded the Kingdom under the Mountain in T.A. 1999 at Erebor.
Around T.A. 2000, Scatha, a mighty Long-worm of the Grey Mountains and one of the greatest Dragons to infest that range of the north, had plundered treasure from the Dwarves and kept it in his hoard. He was slain by Fram son of Frumgar in the early days of the Éothéod. His recovered hoard was the subject of great dispute between the Men Dwarves of the Grey Mountains, who claimed the hoard as their own.
During the Watchful Peace most of Durin's Folk were gathering to the Grey Mountains and in T.A. 2210 Thorin I abandoned Erebor and also joined the others. Nearly six hundred years later, Dragons began afflicting the Dwarves. In 2589 Dáin I was slain by a Dragon and the Grey Mountain strongholds were abandoned after the Wars of the Dwarves and Dragons. About 2480 Orcs had begun to infest the Misty Mountains and spread to the Grey Mountains, such that by 2941 Gandalf the Wizard could say that the range was "simply stiff with goblins, hobgoblins, and orcs of the worst description". However, after the Battle of Five Armies the number of Orcs in the Grey Mountains were greatly reduced (some three parts of them had perished).
There still was a remnant of the Dwarves in the Ered Mithrin after the core of the population left, but were probably few; working whatever mines they could hold from the Orcs and Dragons.
 Other versions of the legendarium
 Portrayal in adaptations
2018: The Lord of the Rings Online:
- Ered Mithrin is an area in "The Dwarf-holds" region. The area consists of the southern slopes of the mountains and the land north of Eryn Lasgalen, and is accessed by a road going through the Dale-lands west of Erebor. The Grey Mountains have been settled both by the Longbeards and by a house of Easterling dwarves known as the "Zhélruka". They are now inhabited by many lesser Dragon-kind as well as the true Dragons "Etterfang Foulmaw", Smaug's sister, and "Hrímil Frost-heart". Orcs and Trolls from Gundabad can also be found there.
- ↑ 1.0 1.1 1.2 J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The West of Middle-earth at the End of the Third Age" [map]
- ↑ 2.0 2.1 J.R.R. Tolkien, Christopher Tolkien (ed.), The Peoples of Middle-earth, "X. Of Dwarves and Men", "Relations of the Longbeard Dwarves and Men"
- ↑ 3.0 3.1 3.2 J.R.R. Tolkien, The Lord of the Rings, Appendix A, "Durin's Folk"
- ↑ Robert Foster, The Complete Guide to Middle-earth, entry "Scatha"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The House of Eorl"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Third Age"
- ↑ Cite error: Invalid
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- ↑ J.R.R. Tolkien, The Hobbit, "Queer Lodgings"
- ↑ J.R.R. Tolkien, The Hobbit, "The Return Journey"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "V. The Ambarkanta"