Some of these remain good fishing through the fall season. Typically these are larger waters such as the Teton River, Warm River, Blackfoot River, and the Portneuf River. A few of the smallest waters will remain good fishing. Birch, Tincup, Robinson, Bitch creeks, and the Little Lost River are among these. Because waters on these are at base level (meaning low), flies should be smaller and have less “flash” which could startle fish rather than attract them as they would during higher water. If you prefer to fish dry on any of these, concentrate on using BWO and midge life cycle patterns. On nicer days traditional dry attractor patterns in smaller sizes will bring responses. But without a doubt the most effective fishing will be either nymphing or presenting streamers on all of these.