My friend Gary and I fished Indian Creek Reservoir on 7/31/15.  We fished from just before 10 AM until 4:30 Gary landed 7 fish, I landed 9.  All of our fish were caught in the deeper end of the lake near the dam.  

The hot flies were a pheasant tail and a hare's ear, both around size 14-16.  Both of us caught a few cutthroat trout in the mix with the rainbows.  The weather was very unpredictable with the wind changing directions over and over.  There was a little rain, though not heavy.  Air temps were in the 80's, a nice break from the 100's we were seeing ont he other side of the hill.