There are certainly a lot of float fishing ongoing. Just look at how crowded the Conant, Palisades, and Spring Creek boat launches are. But walk-in wade is quite popular as seen by the number of folks on the river road above Heise. Mutant golden stone flies are active in the early mornings and attract fish. Riffle fishing is “off and on,” so be patient. Hoppers are everywhere along the river, and caddis activity can make for good evening fishing.
Hoppers are out big time on the lower river, but the fish are after them mainly in the early hours then again during evening. They are also out big time on the Last Chance-Harriman and Flat Ranch sections river where tricos are on during morning hours with caddis during evening. As they fade about late AM, switch to hopper and other terrestrial insect patterns (use long drag-free floats). Fishing on the Flat Ranch section is slowing down as flow out of Henry’s Lake is dropping and warming. It’s still a good idea to have rusty spinners (#16-18) in that fly box anywhere you try the upper river.
Our extended hot dry, weather is making fishing tough on many of our smaller streams. Some, like the Salt river tribs coming out of Idaho, are at base level flows already and warming to high water temps during daytime. Larger and spring-fed streams are still in good shape. Count Bear, Big Elk, Bitch, and Palisades Creek among these. Teton and Warm Rivers are in good shape. Flow out of Blackfoot Reservoir into the river is up enough (600cfs ) to make for tough fishing unless you stick to the bottom. You will need a Wyoming fishing license for Greys River, but it is offering some really good fishing now with caddis and some PMDs remaining, and terrestrial insects making for action. For up to date conditions on the Greys River, Greys River Sports , 106 Greys River Road provides the best info. On the east edge of Alpine, They offer fly fishing gear along with a variety of outdoor gear. Call them at 307-654-3474 or look their web site: www.greysriversports.com.
Anywhere you go for trout in these waters, fish deep with a slow retrieve. As weather cools, look for action to pick up.
If you fish the river below Ashton Dam during daytime, why not just go for a swim. In Island Park terrestrial insects are just as abundant as on the lower river. But with cooler water fish are more active in taking them. They seem to like small (#18) rusty spinners, too. Tricos should be showing in significant numbers soon. Two rig nymphs (big pattern trailed by a small one) are working in Box Canyon. Water is dropping and warming in the Flat Ranch portion. This means larger fish there will be moving downstream.
If you intend to fish waters off the main park highways, expect big time delays because of hoards of tourists. Traffic lines at the west entrance extend for a half mile back west by mid morning. You can hear accents from all languages on the globe. The same is happening at other entrances. So get there early enough to be about the first in line. When you finally arrive at your fishing destination terrestrial insect patterns (including spruce moths around forested areas) are working as good as anything. Present these patterns with long, drag-free floats.
Creek mouths and springs are the places to fish these dog days of summer. Most of what’s being caught are cutts in the 15-18 inch range. Traditional Henry’s Lake flies work best. If you do not have one, pick up one of Bill Schiess’s book “Fishing Henry’s Lake.” It has tips for where to fish and how to approach this time of year as well as traditional Henry’s Lake fly patterns. It is a treasure trove of Henry’s Lake fly-fishing information.
With flow out of Mackay Dam about 450 cfs, wading in the river below is a bit tough. But with caddis, western green drakes emerging and terrestrial insects falling into the water fishing is good.
Look at the boat ramp-parking areas. A glance at these tells how good the fishing is (for example Spring Creek overflows to near the highway during daytime). Mayflies, early morning mutant stones, PM caddis and terrestrial insects are active. Have patterns for all of these, and you will find action. At 9800 cfs at Irwin, 10700 cfs at Heise and 4850 cfs at Lorenzo, the river could not be in better shape.
Thanks to grasshoppers it does not matter where you go from the Teton River to smaller streams such as Little Warm River dry fly fishing will be good. To supplement the effectiveness of hopper patterns these days, be sure to have caddis life cycle, traditional attractor, ant, and beetle patterns. In a few streams small PMDs are still around, and tricos will be soon showing up. Kokanee are beginning to show in lower Big Elk Creek and western green drakes (flavs) should show up in significant numbers any day now.