Went down to Pueblo this last Friday, the 24th... CPW had just stocked the river earlier that week. Tons of 10" rainbows between the two bridges in the river, and they were almost ALL feeding on the surface. However, for the life of me I couldn't get anything to hook up on a dry fly, tried a Griffith's gnat, 20 parachute adams, klinkhammer adams, purple adams…. only thing that got any response was my purple adams… I had one refusal, and one other trout that just came up and looked at it. Also tried drifting a smaller zebra midge pattern, and that got no response from the stockies.
Only fish I was able to connect on were on a small olive leech pattern, and a gray leech pattern, I believe they were a size 10 or 12, just was swinging it across the current, and drifting it, got hits on both.
Other anglers fishing the next pool said they had success on small leech patterns as well.