Walker Lake is the source of the Kobuk River in northwestern Alaska (emptying into Kotzebue Sound). The lake is located near the easternmost part of Northwest Arctic Borough, deep in the remote interior of northern Alaska. Explored during an expedition led by John C. Cantwell in 1885, under the authority of the Revenue Marine. Also known as "Big Fish Lake", Inupiaq legend in the area told of giant, ferocious fish that inhabited the waters.