At flows around 400 cfs and below expect to bang a few rocks if your floating down Box Canyon, the river is very low! The salmon flies will likely start to disappear this week and the Goldens will be around from here on until July.  You can have good luck on smaller perdigons and and PT’s. When it is overcast it never hurts to strip a streamer. If you like chucking meat, that is your time. Bright colors are working like a Flash and Grab #4 in the Box. Black or Olive Sculpin patterns if you're feeling edgy or just tired of pretending you're a dry fly purist. The river at Last Chance can fish good as well, there has still been some caddis around. Try a size 16 Mathews X-caddis or a size 16 Hackle Stack Caddis Peacock . It also never hurts to drop a Lawson’s Partridge Caddis Emerger size 16 olive or tan below your dry.