What mountain is the dwarves' lost homeland in The Hobbit?

What mountain is the dwarves’ lost homeland in The Hobbit? Their lost homeland is the Lonely Mountain. It is the isolated stronghold northeast of Mirkwood where the Dwarves of Durin’s Folk established the Kingdom under the Mountain.

Before the events of the novel, the Lonely Mountain was a prosperous centre of Dwarven wealth and craftsmanship. The nearby human town of Dale grew in close partnership with the Dwarves. That prosperity ended when Smaug attacked, drove out the inhabitants, destroyed Dale, and claimed the mountain’s enormous treasure hoard.

Thorin Oakenshield, grandson of the former king Thrór, leads the attempt to reclaim it. With Bilbo, Gandalf, and twelve other Dwarves, Thorin uses a secret door and a key connected to Durin’s Day. Bilbo’s encounter with Smaug helps trigger the dragon’s attack on Lake-town and the events leading to the Battle of Five Armies.

Mount Gundabad is another important Dwarven site, while Caradhras belongs to the Misty Mountains and Mount Doom is in Mordor. None is the homeland sought by Thorin’s company.