Their range extends to throughout northern Tweedsmuir Park in alpine and forested habitat in the summer and to the mouth of the Entiako River where the migrates in late winter. By the early 1990s the herd was already declining. Research was undertaken to manage the herd as logging activities were proposed in the area near their winter range.
The range of these animals covers northern Tweedsmuir Park, encompassing alpine and forested areas during summer and reaching the Entiako River's mouth by late winter. By the early 1990s, the population had begun to decline. Efforts were made to conserve the herd as logging operations were planned in the area near their winter grounds.