|Location||East of Erebor, northwest of Rhûn|
|Realms||Wherever the King of Durin's folk has made his dwelling|
|Description||Hill-remnants of the Ered Engrin and a realm of many of Durin's folk|
It officially became a Dwarf-realm in T.A. 2590, when Grór left the Grey Mountains after losing its dominance to Dragons. Over hundreds of years it became a great realm, especially after the destruction of Erebor. Before the death of Smaug, the Iron Hills was the main dwelling of Durin's folk in the East, and was also the strongest realm militarily in Wilderland.