"Ukon River"? You Likely Mean the Yukon River

There is no river named "Ukon River." You are almost certainly thinking of the Yukon River—one of North America's great waterways.

Yukon River Quick Facts

• Length: 3,190 km (1,982 mi) — 3rd longest in USA (after Mississippi, Missouri).
• Source: Llewellyn Glacier / Atlin Lake, British Columbia, Canada.
• Course: NW through Yukon Territory (Whitehorse), into Alaska (Fairbanks region via Tanana), west across Alaska to Bering Sea.
• Mouth: Yukon-Kuskokwim Delta (vast, 129,500 km²)—one of world's largest river deltas.
• Basin: 832,700 km² (321,500 mi²) — ~size of Turkey.
• History: Klondike Gold Rush (1896–99) highway. Steamers, sternwheelers. Indigenous (Gwich'in, Yup'ik, Koyukon) lifeline for millennia.
• Salmon: World's longest salmon run (Chinook, chum) — 3,000+ km upstream.

Pronunciation: "Yoo-kon" (not "U-kon"). Name from Gwich'in Yuk-un-ah ("great river").