Two best places to fish the upper river are at Box Canyon where bead head nymphs and late day streamers bring the best action. Next is Last Chance which offers some very good BWO fishing on cloudy days. The lower river also offers BWOs and nymph fishing with caddis emerging and a few hoppers remaining. But for big fish the best strategy here is to pitch streamers under low light conditions. Browns are moving throughout the lower river, and they are taking steamers. Have dark colored and light colored patterns in your fly box. If one does not produce after a dozen or so casts, switch to the other. Best locations to encounter big browns seems to be below Ashton Dam to Chester backwaters, around the Wendell bridge just north of Ashton, and just below St. Anthony on downstream.