Northern Transitional Alpine Forests ecoregion setting The Northern Transitional Alpine ecoregion forms a small crescent in west-central British Columbia that encompasses the western ranges of the Skeena Mountains as well as the Bulkley Ranges. The ecoregion lies between the more rugged mountains and wetter coastal forests to the west and the less rugged mountains and drier montane forests to the east. Climate in the ecoregion exhibits influences from both the maritime conditions of the coast and the continental conditions of the interior. Transition from wet to dry characterizes rainfall patterns from west to east in the ecoregion. Temperatures also vary widely from about 11 degrees Celsius in the summer to about -11 degrees Celsius in the winter.
Permafrost occurs intermittently throughout the ecoregion.