South Fork Snake River

August 15, 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

8,440 cfs

Trend

Steady

Observed

64d ago

Hatch Status

Terrestrial activity will fire up by mid-morning and keep rolling through late afternoon on sunny days

Conditions

Fast, pushy water is pushing fish tight to banks and into softer seams, clear water means you'll need to dial in your accuracy. As of August 26, flows were running well above normal at 5,930 cfs at Lorenzo, so adjust your positioning and expect continued terrestrial activity from mid-morning through late afternoon as warm skies activate grasshoppers and other land insects. Grasshopper and terrestrial patterns in tan and purple work best 10 AM–5 PM, with mutant stoneflies 8–11 AM and caddis picking up toward evening; consider Bionic Hoppers, Henneberry patterns, or small nymphs like Pat's Rubber Legs and Frenchie Jigs to match the mixed hatch windows.

Gauges

Techniques

  • Precise presentations matter in clear water; fish are concentrated tight to banks and in softer seams during high flow

Recommended flies

Bionic Hopper - Tan #12Bionic Hopper - Purple #12Keller's Henneberry Hopper - Tan #12Coffey's CH Sparkle Minnow Sculpin #6Tungsten Pat's Rubber Legs - Tan & Brown #6Joe's Mini Crayfish Jig #6Bionic Ant 2.0 - Black #16Corn-fed Caddis (CDC) Tan #20Tungsten Split Case Nymph - PMD #20Egan's Thread Frenchie Jig - Olive #12Parachute Adams - Blue Wing Olive #22Olsen's Straggle Stone Brown Barbless #12