Cowlitz River coho starting to show Posted on November 21, 2014January 5, 2015 by Bob Rees SW Washington – Cowlitz River coho fishing is starting to slow and fish are turning color. Coho returns to this facility are the highest on record, dating back to 1969.... 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.