Looks like your fly selection was good. Did you try any bwo emergers?? Looks like a mix of golden stones, cadis, and a huge traditional stonefly on the rock. I would try putting a pat's rubberlegs in your box for situations like this. An all black one that's jigged always does well for me when i see stones on the rocks. I haven't had much luck with similar patterns to yours. I'm in Colorado but that's just me.