Willamette River Fishing Report September 21st, 2018 Posted on September 20, 2018 by Bob Rees Willamette River Fishing Report – Still few anglers pursuing coho on the mainstem Columbia, mostly at the mouth of the Clackamas River. Some spinner casters are occasionally trying their luck... This post is only available to Members. If you are a Member, please be sure to log in. You can do this on the top right of almost any page on our site. If you want to become a member or find out more, take a look here.