Walking along the Willamette River last week, I saw a dead salmon, 16-18" or so; couldn't identify it for sure, but maybe a chinook jack. This was about 10 river miles north of Salem. The water temperature in that area is much better suited for bass, perch, crappie, etc this time of year. Can anybody provide a likely explanation for that salmon's presence? I'm fairly new to Oregon, so have not yet locked in on the run timing of various species of salmon.