If you are going to fish the water at Allenberry, dare to be different. I like fishing the downstream end of the C&R area and working my way back up to the dam. Fish tight to the shore. You will be surprised how many fish are lined up and willing to take dries. While all the flies suggested so far are good, there are plenty of streambred browns who have seen it all. I like #16 Red Humpies, #16 Royal Wulffs, #16-18 Irresistables, #18 Rat Faced McDougal, #18-20 Cinnamon and Red Ants, #16 Houseflies. Underneath, you can't beat a #14 Honeybug in pale yellow, light olive or cream either sight fishing in the shallow runs or under an indicator in the deeper water. Let me know if you have any other questions.