Upper Willamette System Fishing Report and Forecast Posted on July 7, 2022July 8, 2022 by Glenn Zinkus McKenzie River – Trout. North Fork of the Middle Fork Willamette. Detroit Reservoir Trout Alton Baker Canal: Alton Baker Canal was stocked last week with 900 legal size trout, and again with the same this... This post is only available to Members. If you are a Member, please be sure to log in and remember to select the Remember Me option. If you want to become a member or find out more, take a look here.