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Koyukuk River

Koyukuk River
Koyukuk River autumn.jpg
Flowing through the Kanuti National Wildlife Refuge
Name origin: Koyukon people
Country United States
State Alaska
Census Area Yukon-Koyukuk
Cities Evansville, Bettles, Allakaket, Hughes, Huslia
Source confluence of North and Middle forks
 - location Brooks Range
 - elevation 715 ft (218 m)
 - coordinates 67°02′49″N 151°04′26″W / 67.04694°N 151.07389°W / 67.04694; -151.07389 
Mouth Yukon River
 - location Koyukuk
 - elevation 115 ft (35 m)
 - coordinates 64°55′24″N 157°33′14″W / 64.92333°N 157.55389°W / 64.92333; -157.55389Coordinates: 64°55′24″N 157°33′14″W / 64.92333°N 157.55389°W / 64.92333; -157.55389 
Length 425 mi (684 km)
Basin 32,000 sq mi (82,880 km2)
Discharge for Hughes
 - average 14,250 cu ft/s (404 m3/s)
 - max 330,000 cu ft/s (9,345 m3/s)
 - min 280 cu ft/s (8 m3/s)
Koyukuk River is located in Alaska
Koyukuk River
Location of the mouth of the Koyukuk River in Alaska

The Koyukuk River (Ooghekuhno’ in Koyukon) is a 425-mile (684 km) tributary of the Yukon River, in the U.S. state of Alaska. It is the last major tributary entering the Yukon before the larger river empties into the Bering Sea.

Rising at the confluence of the North Fork Koyukuk River with the Middle Fork Koyukuk River, it flows generally southwest to meet the larger Yukon River at Koyukuk. The river, with headwaters above the Arctic Circle in the Endicott Mountains of the Brooks Range, drains an area north of the Yukon River that includes part of the Gates of the Arctic National Park and Preserve, as well as Kanuti National Wildlife Refuge and Koyukuk National Wildlife Refuge.

The main stem of the river is lined by the communities of Evansville, Bettles, Alatna, Allakaket, Hughes, and Huslia before reaching Koyukuk. Its headwaters tributaries include the Koyukuk's south, middle, and north forks, the Alatna River, and the John River. Major tributaries further downstream include the Kanuti, Batzu, Hogatza, Huslia, Dulbi, Kateel, and Gisasa rivers. Of these, the Alatna, John, and North Fork are National Wild and Scenic Rivers, as is the Tinayguk River, a tributary of the North Fork.


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