In 2010, westslope cutthroat trout (Oncorhynchus clarkii lewisi) were listed under the federal Species at Risk Act as a species of Special Concern throughout their range in Canada. In British Columbia their status is one of Special Concern, while Alberta’s Wildlife Act lists them as Threatened. In the United States, these fish are designated as Imperiled in Idaho, Vulnerable in Montana and Oregon, and Critically Imperiled in Wyoming.