The Blue river this time of year tends to be hit or miss. Over the last week that is exactly what I have experienced. Certain days will produce multiple quality fish on a half-day, others you are lucky to hook a few and land one or two. Persistence and patience are key when dealing with these variable days. There tends to be a good feeding window that will only last for a small period of time as well, capitalize on this time! I have found 8:30 am-11:30 am to be the best, and as I mentioned, that is always changing! Stick with it. Flies that you can't really go wrong with, and I have found most successes are: Brown leech #16, Black Beauty #20, Grey RS2 #20, Rainbow Warrior #18, Jig Frenchie #18 + #20, and lastly smaller hoppers, yes, believe it or not, those picky Blue River trout are very willing to eat a hopper from the surface, even with these low flows, try it!