Stocker Bows, lack of spotting and bright silver gives it away. CuttBow will have a very distinctive ORANGE slash on either side of the lower jaw. Wild rainbow will have a distinct red lateral line, very prominant spotting, pale orange fins with a white tip.
Go to the Colorado DOW web page. There are a few articles on what I believe these trout are, which would be a cross of Germany's Hofer trout, Harrison Lake Rainbow from Montana and wid river trout. The Hofer was brought here from Germany in 2006 to help combat whirling desease. Interesting articles.