Troll Mountains (the Vast)

The Troll Mountains, also called the Trollcrag Mountains, was a small mountain range in the Vast in north Faerûn, running north of the River Vesper from the Dragon Reach in the west to the Earthspur Mountains in the east.

Geographical features
The Troll Mountains were an arm of the greater Earthspur Mountains.

They held two major passes, Viperstongue and Three Trees Pass. Viperstongue in the east was a low saddle valley through which ran the Cross Road. In the west, Three Trees Pass was a long cleft between the Troll Mountains and the Earthspur or Giantspike Mountains, along which the North Road ran.

The mountains were riddled with old dwarven mine tunnels.

Inhabitants
As the name said, trolls once hunted the slopes and valleys of the range, but by 1370 DR they were nearly wiped out by the dwarves, leaving few trolls. The dwarves made their homes in mines in high mountains by Three Trees Pass.

History
The dwarven mines of the Troll Mountains were at one time rich in iron and copper, but these were thoroughly worked out by 1370 DR, producing very little of metal. The disused passages were overrun by monsters.