|Location||East of Erebor, north-west of Rhûn|
|Realms||The Kingdom of Durin's folk|
The Iron Hills were a range of great hills in the north-east of Wilderland. The Hills were the source of the river Carnen and rich in iron.It was also home to a Dwarf-realm of the Longbeards.
 Early History
The Hills were mined for thousands of years by the Longbeards, being their primary source for iron above all the rest of their territories. The Dwarf-road of Mirkwood ran north-east to the Hills for the dwarf-traders and merchants between Khazad-dûm and the Hills.
 Third Age
In T.A. 1981 the last of the Dwarves living in Khazad-dûm fled from the Balrog who had slain kings Durin VI and Náin I. Some of those who escaped wandered as far as the Iron Hills and resettled there.
In 2570 dragons began afflicting the dwarves in the north and in 2589 King Dáin I was slain by a cold-drake outside his halls in the Grey Mountains. Due to these depredations, in 2590 Grór son of Dáin left the Grey Mountains and established a Lordship in the Iron Hills.
Over the next few centuries Grór and his people built the hills from a just an ancient mining colony to a great realm, especially after the destruction of Erebor in 2770 when the Dragon Smaug scattered the Longbeards who dwelt there. Most of the survivors subsequently went to their kinsmen in the Iron Hills, swelling its numbers.
Before the death of Smaug in T.A. 2941, the dwarven realm in the Iron Hills was the only force in the north-east of Wilderland capable of offering a large and strong enough resistance to the forces of evil.
In 2799 the final battle of the War of the Dwarves and Orcs occurred in the Dimrill Dale. When reinforcements, led by Náin, arrived from the Iron Hills the battle turned in the favour of the dwarves. With the war over, Dáin led his people home where, after the death of Grór, he became the new Lord of the Iron Hills.
In 2941 Lord Dáin Ironfoot led his warriors in the Battle of Five Armies near Erebor. The battle won but Thorin slain and Dáin became the new King under the Mountain and King of the Longbeards as Dáin II. He relocated to Erebor with many of his people, and re-established it as Durin's folk's greatest and strongest dwelling in the north.
The Iron Hills pass out of history after this relocation, but probably were not wholly deserted.
 See also
- ↑ 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, "The Tale of Years of the Third Age"
- ↑ J.R.R. Tolkien, The Hobbit, "The Gathering of the Clouds"
- ↑ 4.0 4.1 J.R.R. Tolkien, Christopher Tolkien (ed.), The Peoples of Middle-earth, "Of Dwarves and Men", "Relations of the Longbeard Dwarves and Men", p. 302
- ↑ 5.0 5.1 Robert Foster, The Complete Guide to Middle-earth, p. 212
- ↑ Karen Wynn Fonstad, The Atlas of Middle-earth p. 78
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Peoples of Middle-earth, "Of Dwarves and Men", "Notes", p. 323 (note 30)
- ↑ 8.0 8.1 8.2 8.3 8.4 8.5 8.6 J.R.R. Tolkien, The Lord of the Rings, Appendix B, "The Third Age"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The Quest of Erebor"
- ↑ 10.0 10.1 J.R.R. Tolkien, The Lord of the Rings, Appendix A, "Durin's Folk"