The Kitimat Ranges lie between the Nass River and Portland Inlet in the north and the Bella Coola River and Burke Channel on the south, and are bounded on their east by the Hazelton Mountains and include the mountainous islands of the North Coastal Archipelago, as well as King Island, which lies between Dean Channel and the aforesaid Burke Channel. Some of those islands are part of a separate formation known as the Coastal Trough.