Perhaps the best example would be the Blue in Colorado, which is designated as part of their "Gold Medal" program, waters singled out as capable of sustaining naturally reproducing wild populations of trout. They used to stock the Blue, I helped the CF&G guys do it one time.
Tom;
Fished the Blue about 5 years back where a few trees and a divergence came together. Did well on hoppers. Lot of open water.
Murf
