The Willow-Whitehorse Basin cutthroat trout refers to a population segment of the
cutthroat trout complex (Oncorhynchus clarkii) from the streams of the Whitehorse Basin (or the Coyote Basin[1]), southeastern
Oregon. It is alternatively considered as a part of the
Lahontan cutthroat trout subspecies (Oncorhynchus clarkii henshawi),[2][3] or of the
Humboldt cutthroat trout (O. c. humboldtensis) whose main range is in Nevada.[4] These fish have adapted to live under extreme conditions, and can withstand water temperatures as high as 85 °F for short periods of time.[5]