ramrodncf -
Interesting question. During the 1960s and 1970s as well during the 1980s creel surveys when wild fish could be kept the largest fish that I could document from the Snohomish system were fish between 25 and 26 pounds. Know several very good steelhead fisherment that fished the system from 1950s into the early 1980s that never broke 20#s.

However as ondarvr post indicates with CnR and WSR larger fish (over 25#)were much more common from the mid-1980s on. Better fishermen, better management or??

Tight lines
Curt