Cohoangler picked up on the real point - salmon and steelhead evolved in and are adapted to old growth forest conditions, that detained, cleansed, and cooled the water and provided huge inputs of woody debris to river systems. Todays forests are so badly modified from their original conditions that I'm surprised that any wild fish survive at all - actually they are going extinct after all, aren't they?
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The fishing was GREAT! The catching could have used some improvement however........