Tributaries of the Columbia River

The Columbia River is the fourth largest river in the United States by streamflow and largest by discharge into the eastern Pacific Ocean. Can you name its major tributaries?

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Last updated: April 27, 2025

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First submitted	April 27, 2025
Times taken	2
Average score	21.4%
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Length	Average Discharge	Answer
1,078 mi	56,900 ft³/s	Snake River
187 mi	37,400 ft³/s	Willamette River
485 mi	30,650 ft³/s	Kootenay River
479 mi	26,430 ft³/s	Pend Oreille River
105 mi	9,140 ft³/s	Cowlitz River
111 mi	7,900 ft³/s	Spokane River
95 mi	6,125 ft³/s	Lewis River

Length	Average Discharge	Answer
252 mi	5,845 ft³/s	Deschutes River
214 mi	3,542 ft³/s	Yakima River
53 mi	3,079 ft³/s	Wenatchee River
115 mi	3,039 ft³/s	Okanogan River
175 mi	2,925 ft³/s	Kettle River
57 mi	2,257 ft³/s	Sandy River
284 mi	2,060	John Day River