Upper Willamette System Fishing Report & Forecast Posted on May 5, 2022May 5, 2022 by Glenn Zinkus Upper Willamette System Fishing Report and Forecast Detroit Reservoir Kokanee. McKenzie and Willamette Systems Too High Alton Baker Canal: Alton Baker Canal was stocked this past week with 1750 legal size trout, in addition to... 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. If you are looking for our free content head here. And, if you need a hand, please reach out here.