The flows are coming down, 725 cfs at the Montana, Wyoming border so you should be able to get around in the canyon. The usual late summer flies will work, para Adams, Caddis, Trudes, small hoppers and bettles, PMDs for dries. Small BH Pheasant Tail, Princes, Copper Johns,
Reports for Upper Clarks
Flows are down and the hatches are out. Just a short 1 mile hike around private property and you are fishing. Caddis, Para Adams. PMDs, Royal Wolf, small hoppers dropped off with BH Pheasant Tail, Copper John, North Fork Special, Bloody Mary will do the job.
Water and flows are good now. Good hatches of caddis flies and some PMDs. An hopper dropped off with a Bloody Mary, Prince, Copper John, small North Fork Special or BH Pheasant will work.
All the lakes are fishing well. Small dries and nymphs are working.
Water is clear and fishing well. Small dries like the Para Adams, Caddis, Trudes and Humpy will catch fish.