South Fork Snake River

October 10, 2026

By Barbless, compiled each morning from the gauges, forecasts and sources on this page.

South Fork Snake River

Current conditions for South Fork Snake River · Map, access and gauges

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Flow

4,050 cfs

Trend

Steady

Observed

6d ago

Hatch Status

Egan's Silver Bullet Baetis working in size #14

Conditions

As of October 12, flows were around 4,050 cfs at the gauge near Irwin, holding steady and in the comfortable fall wading sweet spot. Clear conditions won't last: rain moving in through the weekend will spike turbidity first in the upper sections near Palisades, so plan to fish Conant Valley and lower canyon reaches in the morning. Heavy Mahogany Dun hatches and Blue-Winged Olive activity will keep fish looking up, even under overcast skies. Midge, light caddis, and terrestrial ants round out the menu. Consider parachute BWOs, Baetis patterns, small nymphs, and midge for the window you have before the weather closes in.

Gauges

Recommended flies

Parachute Blue Wing Olive #22Top Secret Baetis #16Juju Baetis Tungsten #22Olsen's Quilldigon Olive #22-24Egan's Silver Bullet Baetis #14Egan's Frenchie #12Olsen's Hare's Ear Blowtorch #20-28Black Zebra Midge #20Bionic Ant 2.0 Black #16Soft Hackle Pheasant Tail Jig #12Egan's GTI Caddis Olive #12Barr's Flashback Emerger BWO #22