Region
Coastal and mountain streams of Arctic, Pacific, and Missouri River drainages from extreme southern Yukon in Canada to headwaters of Columbia River drainage in northern Nevada, USA, and McCloud River drainage in northern California, USA.
Distribution
Coastal and mountain streams of Arctic, Pacific, and Missouri River drainages from extreme southern Yukon in Canada to headwaters of Columbia River drainage in northern Nevada, USA, and McCloud River drainage in northern California, USA.