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South Fork of the Snake River Fishing Report 9/25/25

Fly Fisherman with Brown Trout on the South Fork of the Snake River

South Fork Fishing Report

The flow out of Palisades is currently 7,312 cfs, with the reservoir sitting at just 10% capacity. With the low pool, we’re now seeing some turbidity coming out of the dam, but it clears quickly as the water moves downstream. These flows are opening up more riffles and creating additional opportunities for wading. Expect the water to continue dropping as irrigation demands taper off.

As always, the South Fork is serving up a variety of tactics and techniques. For dry fly anglers, terrestrials remain in play—hoppers, beetles, and ants are all good bets. Try fishing a hopper with a small dropper that imitates a Blue-Winged Olive nymph or emerger. Productive patterns include the Psycho May, Split Case BWO, or a Tungsten Thread Midge in brown or olive, sizes 16–20. These same flies have also been working well in double-nymph rigs.

We’re still seeing some caddis in the evenings and early mornings, along with a few October Caddis starting to show. Streamer fishing remains productive, especially during low-light windows and on overcast days. Looking ahead, the forecast is calling for some cloudy, rainy weather early next week, which should spark stronger mayfly hatches and more aggressive streamer eats.

Until then, enjoy the beautiful fall weather and what may be the last stretch of hopper season.

Book Your Fall Trip

October is one of the best months to experience the South Fork—fall colors, fewer crowds, and hungry fish. We’re offering 35% off lodging all October, and our guides and fly shop staff are here to help you make the most of your day on the water.

Call the lodge for guided trips or lodging specials, or stop by the fly shop for flies, shuttles, and advice.

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