South Fork Snake River

September 26, 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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Hatch Status

Mostly cloudy skies today with a high of 74°F set up ideal conditions for Mahogany Dun and BWO activity

Conditions

Clear water and moderate flows have concentrated Yellowstone Cutthroats, Browns, and Rainbows tight along cutbanks and seam water. Mahogany Duns dominate midday, with steady Blue Wing Olives throughout the morning into early afternoon, moderate midges first thing, light caddis in late afternoon, and occasional ants midday. Approach from downstream and stay low in this gin-clear water, focusing nymphing on 2 to 4 foot depths along the willow-lined banks.

Gauges

Techniques

  • Egan's Silver Bullet - Baetis #14 working
  • Juju Baetis Tungsten #22 working
  • Olsen's Hare's Ear Blowtorch Barbless #20-28 working
  • Parachute - Blue Wing Olive #22 working
  • Top Secret Baetis #16 working

Recommended flies

Parachute Blue Wing Olive #22Top Secret Baetis #16Juju Baetis Tungsten #22Egan's Silver Bullet Baetis #14Olsen's Hare's Ear Blowtorch #20Roza's World Spain Perdigon #18Bionic Ant 2.0 Black #16Corn-fed Caddis CDC Tan #20Coffey's CH Sparkle Minnow Sculpin #6Tungsten Jig Bugger Olive #14Black Zebra Midge #20Egan's Frenchie #12