Columbia River Fishing Report May 31st, 2018 Posted on May 31, 2018 by Bob Rees Columbia River Fishing Report – Despite increased opportunity for mainstem salmon (and steelhead), success rates haven’t been all that impressive for what can be an exciting time of year. The... 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.