From the benchWith fog burning off by 9 AM and temps climbing to 67°F, the best dry-fly window will open mid-morning as BWOs start popping in the riffles — position yourself upstream of rising fish and present with a reach cast to buy yourself an extra foot of drag-free drift. In the afternoon, shift to terrestrials along the grassy banks; the Smith's canyon walls funnel ants and beetles onto the water reliably on calm, warm September days. If you're not seeing surface activity, anchor a heavy Frenchie or Thread Frenchie Jig at the head of a pool and let it dead-drift all the way through the tailout — at 55°F, trout are feeding hard and holding in classic lies.