Which language family was spoken by many Western Subarctic peoples?

The Western Subarctic region is largely home to speakers of the Athabaskan language family, whose territories span from northwestern Canada into the interior of Alaska.1

While the Eastern Subarctic is primarily inhabited by speakers of Algonquian languages, the Western Subarctic is characterized by the Athabaskan-speaking nations, which include groups such as the Chipewyan, Slave, Carrier, and Gwich’in.1