Kobuk River

The Kobuk River, also known by the names Kooak, Kowak, Kubuk, Kuvuk, and Putnam, is a river located in the Arctic region of northwestern Alaska in the United States. It is approximately 280 miles (451 km) long. Draining a basin with an area of 12,300 square miles (32,000 km2), the Kobuk River is among the largest rivers in northwest Alaska, with widths of up to 1,500 feet and flows reaching speeds of 3–5 miles per hour in its lower and middle reaches. The elevation of the Kobuk River Basin is on average 1,300 feet (400 m), ranging from sea level at its mouth on the Bering Sea to 8,276 feet (2,523 m) on the summit of Mount Igikpak.