Koyukuk River
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The Koyukuk River 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.
Flowing through the Kanuti National Wildlife Refuge
Lower course of the Koyukuk in winter
Zane Hills and Koyukuk River
Alatna River
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The Alatna River is a federally designated wild and scenic river partially contained within the boundaries of Gates of the Arctic National Park, Alaska.
Confluence of Alatna and Koyukuk Rivers