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© 2026 Barbless.co. Flow and gauge data from USGS; weather from Open-Meteo. · v2026.10.18.2

  1. Reports
  2. Browse
Oct2026October 2026
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Region

  • All regions
  • North-Central Idaho85
  • Panhandle94
  • Salmon Region10
  • South Central Idaho35
  • Southwest Idaho9
  • Upper Snake / Eastern Idaho85

Rivers & Lakes

  • All waters
  • Big Lost River1
  • Henrys Fork of the Snake River9
  • Henrys Fork of the Snake River, Box Canyon to Riverside13
  • Henrys Fork of the Snake River, Riverside to Mouth / terminus7
  • Henrys Lake6
  • Island Park Reservoir1
  • Mackay Reservoir1
  • Snake River, Osgood Diversion Dam to Henrys Fork1
  • South Fork Snake River36
  • Teton River10

Report Type

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  • Conditions85
  • Outlook11

Browse Idaho Fishing Reports

Current conditions, flows, and hatch notes for Idaho rivers: updated as new reports are published.

Updated October 19, 2026

Filters:Upper Snake / Eastern IdahoRemove Upper Snake / Eastern Idaho filterConditionsRemove Conditions filterClear all

Showing 41–60 of 85 reports

Filters:Upper Snake / Eastern IdahoRemove Upper Snake / Eastern Idaho filterConditionsRemove Conditions filterClear all

August 30, 2026

Upper Snake / Eastern Idaho

Teton River

Strong streamer and nymph fishing on the Teton as fall approaches, with grey drakes, mahogany duns, and BWOs on the water.

August 29, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River

Clear water and dropping flows are opening up better wading on the flatwater. Start with small nymphs and switch to terrestrials as the day warms.

1,360 cfs

August 26, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows are moderate and dropping into a comfortable range, with Mutant Stones and small stoneflies active. Overcast skies and light turbidity near the source make for solid midsummer fishing downstream.

5,930 cfs

August 18, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Summer hatches are firing on the South Fork with Mutant Stones, PMDs, Yellow Sallies, caddis, hoppers, and terrestrials. Water temps at 66°F support both dry and nymph patterns.

6,870 cfs ↓

August 16, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River

Clear water and stable flows are opening up wading on the Henrys Fork, with strong terrestrial and PMD hatches through the day into evening.

1,390 cfs

August 15, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River

Clear water and eased flows have dramatically improved wade access on the Henrys Fork, with PMD hatches dominating midday and terrestrials active throughout the afternoon.

1,470 cfs

August 13, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows are stable around 6,000 cfs with cooling conditions and rain on tap. PMDs, Blue-Winged Olives, and terrestrials should draw fish.

8,740 cfs ↑

August 10, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Multiple summer hatches, Mutant Stones, PMDs, Yellow Sallies, and Caddis, are active on the South Fork, with stable flows around 5,950 cfs and comfortable 67°F water. Both dry and nymph tactics are worth exploring.

8,060 cfs ↑

August 8, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Box Canyon to Riverside

Clear water and stable conditions make the Henrys Fork fishable on August 8, with best dry fly action early before heat and afternoon winds build.

August 7, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Riverside to Mouth

Smallmouth bass are the draw here, with rocky shorelines holding fish that respond well to crawfish and baitfish patterns on sink-tip setups.

August 6, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

The Fork is running elevated flows with fish keying on faster water and responding to morning stone hatches, PMDs, and evening caddis and spinners.

8,180 cfs ↑

August 4, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Summer conditions are prime on the South Fork with multiple hatches active and stable flows around 5,950 cfs. Dry flies and nymphs both work, pair them strategically through the Palisades to Heise stretch.

5,110 cfs ↓

August 1, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Box Canyon to Riverside

Dropping flows improve wading on the upper Henrys Fork, but high water temperatures demand smart positioning and early season timing.

July 31, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River

Henrys Fork is running stable flows around 1,300 cfs with clear conditions. Watch for afternoon thunderstorm turbidity on the upper water.

1,480 cfs ↓

Page 3 of 5

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Upper Snake / Eastern Idaho

South Fork Snake River

Fast, elevated water is concentrating fish tight to banks with clear conditions demanding precise presentations. Terrestrial insects dominate mid-morning through late afternoon; consider grasshopper and small nymph patterns for best results.

8,440 cfs

Upper Snake / Eastern Idaho

South Fork Snake River

Fast, elevated flows push the South Fork's fish tight to cover, making float fishing the smart play. Grasshoppers and terrestrials lead the daytime bite, but expect a short productive window before afternoon heat and smoke shut things down.

8,120 cfs ↑

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Riverside to Mouth

Warm water temperatures and reduced hatch activity make early morning the prime window on the lower Henrys Fork in August. Focus on grasshoppers, streamers, and rubberlegs while flows remain stable around 1,630 CFS.

1,630 cfs

Upper Snake / Eastern Idaho

Henrys Lake

Henrys Lake is fishable in August for anglers with a watercraft and knowledge of cold spring locations. Focus on balanced leeches, chronomids, and cocktail nymphs near cooler pockets.

Upper Snake / Eastern Idaho

South Fork Snake River

Clear water and rising flows have improved conditions on the South Fork, with grasshoppers and stonefly patterns producing from morning through evening.

8,400 cfs ↑

Upper Snake / Eastern Idaho

Teton River

Upper Teton near Driggs is the better bet right now; lower stretches are hot and low. Fish the upper sections with small patterns matching PMDs, damselflies, tricos, and terrestrials.

No flow