Type locality, West Creek, a tributary of Brooks Lake (Ref. 43938). West Creek and Brooks River, Naknek River Basin and Chatanika River, Yukon River Basin (Ref. 89241). Known from the Naknek River system, also from Kvichak, Egegik, and Ugashik river systems. Recently collected from the lower Chena River, near Fairbanks (Ref. 43939).