Mountain Trolls could be found in the mountains of Middle-earth. Their type helped move the great battering ram Grond into place during the Battle of the Pelennor Fields, which they wielded and shattered the large gates of Minas Tirith. Members of the species also were seen opening the gates of the Morannon.
Mountain-trolls were very large, larger than Hill-trolls and had brownish skin.
The mountain-trolls make dangerous opponents in battle. The trolls are smarter than Cave-trolls, and their power to lift massive objects to use as a weapon makes them deadly. It is assumed to be strong enough for other heavy tasks as well. They are also stronger than cave trolls due to their harsh environment.
Portrayal in adaptationsEdit
The Lord of the Rings film trilogyEdit
The Hobbit film trilogyEdit
Three mountain-trolls were also shown in Peter Jackson's An Unexpected Journey when a young Bilbo Baggins distracts them long enough until Gandalf saves the Company of Thorin Oakenshield from being eaten. These three particular trolls speak with a Cockney English accent and as soon as they are exposed to sunlight immediately turn to stone.
- Mountain-trolls are featured in The Lord of the Rings: The Battle for Middle Earth and The Lord of the Rings: The Battle for Middle-earth II. They can rip trees out of the ground and wield trees and rocks, and are able to sustain more damage than Cave-trolls.
- In Middle-earth Role Playing, they are violent and vicious and hurl rocks at enemies.
- In the Middle-earth Collectible Card Game, Mountain-trolls are referred to as "Trolls from the Mountains" and can inflict three strikes on a player's character.