How fast can a salmon swim upstream to Idaho waters?
Friday, May 8, 2015 at 8:33PM
El Guapo in Species, fish n the news, fish science, fish video
On average, an adult spring chinook takes about 18 days to swim 253 river miles from Bonneville Dam to Lower Granite dam, including passage over a total of four Columbia River dams and four more on the Snake River.