What is the name of the mountain where the dwarves' kingdom Erebor is located in The Hobbit?

The mountain where the dwarves’ kingdom of Erebor is located is called the Lonely Mountain. Erebor is the mountain’s Sindarin name, while “the Kingdom under the Mountain” describes the dwarven realm built within it.

In Tolkien’s Middle-earth, the Lonely Mountain lies northeast of Mirkwood, with the human town of Dale situated on its southern slopes. The dwarves of Durin’s Folk established a wealthy kingdom there, famous for its mines, craftsmanship, and immense treasure hoard, including the Arkenstone.

The dragon Smaug invaded Erebor during the reign of King Thrór, driving the dwarves into exile and destroying Dale. Thorin Oakenshield later leads an expedition with Bilbo Baggins to reclaim the mountain. Smaug’s death and the ensuing Battle of the Five Armies determine the region’s future.

The Lonely Mountain is often confused with the Misty Mountains, which are a vast mountain range crossed earlier in the journey, or Mount Doom, the volcano in Mordor where the One Ring must be destroyed. Caradhras is another peak associated with the Fellowship’s journey.