Hearthforge is the dwarven name for the former cave-hall that the goblin, orc, and giant horde seized before Fires at the Fjordgate. Grimnar's people speak of it as their old stone home, with Hearthforge Hall as the great central hall where the ritual to wake Thullgrim was stopped. The entrance sits in a mountain pass between a tall northern mountain and a larger southern mountain. The cave entrance is on the northern face of the southern mountain. The area in front of the cave was used by the horde as a headquarters, war-wagon yard, and main camp. By the time the the adventuring party arrived, most of the army had already marched away and been defeated at Niðaróss, leaving the site mostly empty except for a small remnant watch and deeper occupants. Later records extend Hearthforge beyond the entrance fight. The horde remnants ringed the mountain saddle with signal watchtowers and used the deeper dwarven halls for rituals intended to wake Thullgrim, the troll mountain.