Fishing Report - August 29, 2025

Upper Henry’s Fork

Flows are holding steady around 750 CFS, and fishing should continue to improve with cooler weather and reduced turbidity. Terrestrials like honey ants, beetles, and hoppers are still producing solid results on the Harriman ranch. The Box Canyon is fishing well with streamers and nymphs, although dry fly action has been a bit slower. Expect conditions to pick up as fall approaches.

Lower Henry’s Fork

Flows are good, though weed growth can make nymphing a bit more technical. Hopper fishing is best early in the morning and again in the evening. Streamers are moving a few quality fish, though action is spotty. With water temperatures dropping and fewer anglers around, it’s a great time to explore this stretch. Late evening trico hatches are happening as well.

South Fork of the Snake

Flows have come down slightly, and early-morning dry fly action with mutant stones has been productive. Hoppers and water walkers are effective throughout the day, and nymphing remains consistent. Overall, the South Fork is fishing well and should continue to improve with stable conditions.

Madison River

Hoppers and ants are producing steady action, particularly during midday warmth. Nymphs and streamers are also working well, especially when targeting deeper runs or structure. Fishing tends to be more productive earlier in the day. Focus on fishing behind rocks and seams for best results.

Teton River

The upper Teton is fishing well with PMDs and terrestrials, especially when winds are calm. Hoppers, beetles, and ants are effective mid-morning, while canyon stretches are producing with hopper-dropper setups. Lower Teton flows are getting low and warm, so plan to fish early and wrap up by midday. A small tungsten dropper can boost success in slower water.

Yellowstone National Park

Warm water closures remain in effect for the Madison, Firehole, and Gibbon Rivers. The northeast corner continues to shine, with the Yellowstone, Lamar, and Slough Creek offering excellent fishing. Hoppers and ants are drawing consistent surface takes on calm afternoons. Mayflies and caddis are still active, so be prepared to adjust your rig if fish get selective.

Lakes

Hebgen Lake continues to fish well with strong Callibaetis hatches and occasional trico spinner falls. Watch for morning risers and switch to leeches or chironomids if things slow down. On Henry’s Lake, cooler inflow areas like Targhee and Duck Creek are holding fish. Slow-stripping leeches or using balanced patterns under an indicator is proving most effective.