Rangers of the North
Also known as the Mountains of Lune, Ered Luin or Ered Lindon, the Blue Mountains fringed Eriador to the west. The name ‘Lune’ is an adaptation into Mannish speech of Elvish Lhûn, “blue”. Blue was a colour widely associated with this region, and the word is also preserved in the names of the Gulf and the River associated with the mountains.
In ancient times, the wide lands of Beleriand lay beyond the mountains to the west, but after the cataclysm at the end of the First Age, the Sea came close to the mountains’ foothills, with only the narrow land of Lindon to their west. The Mountains of Lune were a traditional home of Dwarves, and though their great mansions of Nogrod and Belegost had been lost centuries beforehand, there were still Dwarves there in the later Third Age. Indeed, it was from these mountains that Thorin and his companions set out on their famous quest to regain Erebor.