The Great Fenn Range was a mountain range located on the northern part of the continent of Quon Tali. To the north of the Range lay the Ice Fields and part of the subcontinent of Falar, to its south was Forest Fenn, to the southwest Nom Purge, to the west the Horn Ocean, and to the east the Colonnus Sea. The most populous inhabitants were the Fenn.
The Fenn Mountains had been the location of the Citadel, an ancestral hold of the D'Avore family. The fastness was the last of their holds to fall to the Malazan Empire and was brought down by Kellanved with an earthquake.