The
Tagish Highland is an upland area on the inland side of the northernmost
Boundary Ranges of the
Coast Mountains, spanning far northwestern
British Columbia from
Atlin Lake to the area of the pass at
Champagne, Yukon between the
Alsek and
Yukon Rivers. In some classification systems, and in local terminology, the Tagish Highland is considered to be part of the Boundary Ranges, as is the neighbouring
Tahltan Highland to its south. As classified by the Canadian Mountain Encyclopedia per S. Holland, the Tagish Highland is part of the system unofficially described as the
Interior Mountains (also the Northern Interior Mountains).