heads in Schwatka Mts. at Nakmaktuak Pass, flows SW to Kobuk River, Brooks ra.; 75 miles long.
Named in 1890 by Lieutenant Stoney, U.S. Navy (USN), for Dr. James M. Ambler, U.S. Navy (USN), surgeon of the U.S.S. Jeannette, who perished in 1881 in the Lena River delta while with the Arctic expedition under the command of Lieutenant Commander G. W. De Long. The Eskimo name, "Nakmaktuak", meaning "backpacking place", as obtained in 1956 by Orth, was spelled "Nut-vuck-to-wo-ark" in 1885 by Stoney (1900 p. 50), and "Nuck-vuck-to-ark" by Lieutenant J. C. Cantwe.., U.S. Revenue-Cutter Service (USRCS).