Hot weather continues to slow the fly fishing down in the afternoon on most of western Montana’s rivers and streams. There still is very good fishing in the mornings on Rock Creek and some areas of the Blackfoot River. Congo caddis, elk hair caddis, and a variety of medium sized terrestrial patterns are working in the more oxygenated waters. We are hearing mixed reports on the Bitterroot and the Clark Fork. If you can travel a bit you may want to check out the Beaverhead River now-double nymph rigs seem to be extremely effective now-size 16 to 20 nymphs-presentation and water choice seem to be more important than the color. The upper end is where most of the good reports are coming from.