Fishing Report - August 1, 2025

Upper Henrys Fork 

Flows from Island Park Reservoir have dropped to around 780 CFS, creating ideal conditions for targeting larger fish on foot. Wading anglers are doing well dead-drifting streamers through Box Canyon. If you're floating, try golden stone dries tight to the banks and trail heavy beadhead nymphs underneath. In the Ranch section, the dry fly game is as technical as ever—timing is everything. Look for rising fish early and late, and be ready with beetles, honey ants, and hoppers for when the window opens. 

Lower Henrys Fork 

Flows near Ashton are holding at about 1500 CFS, but warm water has really slowed the bite. Your best chance is late in the evening—swinging mice or stripping streamers can still move quality fish. Early mornings offer brief opportunities with hoppers, but overall, fishing is tough here right now. If you're hitting this stretch, focus on short, high-impact sessions and target cooler pockets near structure. 

South Fork of the Snake 

The salmonflies are done, but golden stones are still active and drawing surface eats. Hopper season is in full swing, and pink or golden water walkers have been productive. PMDs are popping in the riffles on certain days and can offer great dry fly opportunities. If fish aren’t looking up, don’t hesitate to go deep—nymphing continues to produce solid numbers throughout the day. 

Madison River 

Dry fly fishing has been hit or miss, but it’s worth getting out early with hoppers, caddis, or chubbies before the sun climbs. Nymphing remains your most consistent option, with rubberlegs and beadheads catching fish from the banks to the center pockets. Streamer fishing has picked up in the evenings—focus on shaded banks and deeper runs for your best shot at aggressive takes. 

Teton River

The upper Teton is offering solid dry fly fishing when the wind stays down. PMDs, golden stones, and hoppers are all in play, especially mid-morning. The lower river is low and heating up, but early risers can still find fish willing to eat hoppers. Drop a nymph two feet below your dry to increase your chances in slower water. Hit it early and be off before the heat shuts things down. 

Yellowstone National Park 

With the Firehole, Gibbon, Madison, and their tributaries closed due to warm water and low flows, anglers are turning to other open rivers in the park. The dry fly fishing has been outstanding. Stoneflies, mayflies, and caddis are all important right now, and terrestrials—especially hoppers, ants, and beetles—are getting consistent action. Focus on riffles and meadow stretches where fish are cruising for surface food. 

Lakes 

Hebgen Lake has been steady, with rising fish targeting Callibaetis, Tricos, and Damsels. When you don’t see much on top, switch to leeches or chironomids and work deeper. On Henrys Lake, trout have pushed into cooler water near inlets—Targhee, Hope, and Duck Creeks are your best bets. Fish slow and methodical with streamers or nymph rigs in these transition zones.