South Fork Snake River

August 29, 2026

South Fork Snake River

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

Flow

3,590 cfs ↓

Trend

Falling

Observed

4h ago

Conditions

Flows are settling nicely at 3,590 cfs as of September 4, trending downward and pushing fish into newly accessible bank seams and eddy lines. Water is clear, though overnight storms can stir things up, so verify conditions before you head out. Grasshoppers are the main event from 11 AM through 5 PM—keep tan and purple patterns in sizes 10–14 handy. Caddis emerge 6–8 PM, ants and beetles work mid-morning through early afternoon, and lighter mayfly activity rounds out the day. Afternoon SSW winds will gust to 36 mph, so plan your dry-fly window for early morning and target windward banks when the gusts arrive.

Gauges

Techniques

  • Corn-fed Caddis (CDC) Olive #20 working
  • Bionic Hopper - Purple #12 working
  • Bionic Ant 2.0 - Black #16 working
  • Bionic Hopper - Tan #12 working
  • Tungsten Split Case Nymph - PMD #20 working
  • Corn-fed Caddis (CDC) Tan #20 working
  • Fish are positioned in softer bank seams and eddy lines during current flow conditions
  • Bionic Ant 2.0 - Brown #12 working

Recommended flies

Bionic Hopper - Tan #12Bionic Hopper - Purple #12Bionic Ant 2.0 - Black #16Bionic Ant 2.0 - Brown #12Corn-fed Caddis (CDC) Tan #20Corn-fed Caddis (CDC) Olive #20Tungsten Split Case Nymph - PMD #20Egan's Silver Bullet - Baetis #14Parachute - Blue Wing Olive #22Egan's Frenchie #12Coffey's CH Sparkle Minnow Sculpin #6Egan's GTI Caddis - Olive #12

Safety

Afternoon SSW winds will gust to 36 mph. Plan your dry-fly window for early morning and target windward banks.