I have just spent the last two days on the South Fork guiding, and I can tell you that there was a huge difference in the fish activity between Monday and Tuesday. Monday was overcast and raining, fish were eating dry flies,nymphs and streamers. Tuesday was the exact opposite type of day in regards to weather, bright Sunny and not a cloud in the sky. The fish were not as eager to eat flies on Tuesday, but they still ate and we caught fish. So here are two different type of days and two different type of fishing reports. In the fall fish are more active during the overcast days and the hatches are much more prolific as well. On the bright sunny days fish still need to eat but typically you will find them hanging in the deeper water eating nymphs. I did see fish rising to Blue Wing Olives on Tuesday and we had a few eats on a Parachute Adams against the bank on Tuesday but the nymphing gave us more opportunities to catch fish. Choosing your day is key this time of year, however if you have a day to fish take advantage of that day regardless of the weather. Rubberlegs, and any assortment of beadhead droppers will catch fish. October caddis and Blue Wing Olives on the surface. Look for trout in the riffles and the slow foam lines. The whitefish are everywhere and are in a pre-spawn eating frenzy just expect to catch them if you are nymphing. All sections have been fishing well, but the Canyon is very pretty right now with the trees changing colors.