Fishing on the lower Henry’s Fork below Mesa Falls has gotten very noticeably slower from what it was in June. There will be very little to no dry fly action on this stretch, so for someone looking to find feeding fish on top I would not recommend fishing here. For the people wanting to fish the Warm River to Ashton stretch, picking apart good-looking runs with indicator rigs will put the most fish in the boat. For choice of fly I would have plenty of rubber legs in both the larger and smaller sizes, split case PMDs, and olive bullet quills. Don’t be afraid to change flies in those runs often to try and figure out what those fish might be eating under the surface.