Upper Willamette System Fishing Report and Forecast Posted on August 3, 2023August 3, 2023 by Glenn Zinkus Dexter Reservoir Bass (And Trout Too). Willamette River Slough Bass. Detroit Reservoir Kokes. Upper McKenzie Trout. Alton Baker Canal: Alton Baker was stocked with 900 legal size rainbows this week, and will be stocked with... 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.