Fishing Report - August 22, 2025

Upper Henry’s Fork
Flows from Island Park Reservoir are now holding steady around 780 CFS, with water clarity improving as sediment has settled out. Fishing in Box Canyon has been solid with nymphs in the morning and streamer action in the evenings. Dead-drifted olive sculpins and smaller articulated streamers are moving some good fish. On your nymph rigs, go with #16 red zebra midges, #18 Two Bit Hookers, or #16 Duracell jigs. In the Ranch, terrestrial season continues—honey ants, beetles, and hoppers are all finding selective trout when the wind is calm. Mornings and evenings are your best window, so be ready to match timing and presentation closely.

Lower Henry’s Fork
Hopper fishing remains strong, especially through the mid and lower stretches. Mornings are best before the water warms—afternoons are tough with higher temps and moss. Foam hoppers like the Rio Juicy Hopper or Morrish Hopper are working well tight to banks. Tricos are still falling in the Fun Farm and Chester backwaters, offering some fun, technical dry fly fishing. A #20 organza spinner or #18 parachute Adams will cover you there. If you want to swing for bigger fish, work deeper holes with Elden's Shiner Minnow or Copper Zonkers.

South Fork of the Snake
The hopper bite is excellent right now—golden and pink water walkers are top producers. Keep an eye on riffles for PMD activity late morning into early afternoon. Nymphing a two-fly rig with a small rubberleg and a #18 tungsten pheasant tail continues to be a reliable way to find fish. Streamers are producing in the low light hours, so have a few darker patterns ready for early mornings.

Madison River
The Madison is in late-summer mode—hopper/dropper rigs are the go-to for covering water. Dry fly action is best early, with caddis and smaller hoppers still pulling fish. Nymphing rubberlegs with a smaller beadhead trailer remains consistent throughout the day. Streamer fishing has been turning on again in the evenings; focus on shaded banks, boulder seams, and faster pocket water.

Teton River
The upper Teton continues to fish well with PMDs and terrestrials. Hoppers, beetles, and ants are especially productive mid-morning when the wind isn’t too aggressive. The canyon stretches are fishing well with hopper-dropper rigs. Lower Teton flows are getting skinny and warm—fish early and be off by midday to give trout a break. A small tungsten dropper below your dry can double your chances in slower water.

Yellowstone National Park
Warm water closures remain in place for the Madison, Firehole, and Gibbon. The northeast corner is still the star, with the Yellowstone, Lamar, and Slough Creek all fishing great. Hoppers and ants are bringing fish up consistently, especially on calm afternoons. Mayflies and caddis are still in the mix, so be ready to switch if trout get picky. Target meadow sections and riffles where fish are cruising for terrestrials.

Lakes
Hebgen Lake continues to produce with good Callibaetis hatches and some strong trico spinner falls. Watch for rising fish in the mornings and switch to leeches or chironomids if the surface goes quiet. On Henry’s Lake, cooler inflow areas like Targhee and Duck Creek are drawing fish. Slow-stripped leeches or balanced leeches under an indicator are the best approach right now.