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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 Region9
  • South Central Idaho34
  • Southwest Idaho9
  • Upper Snake / Eastern Idaho84

Rivers & Lakes

  • All waters
  • Big Lost River1
  • Henrys Fork of the Snake River9
  • Henrys Fork of the Snake River, Box Canyon to Riverside12
  • 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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  • Conditions84
  • Outlook11

Browse Idaho Fishing Reports

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

Updated October 18, 2026

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

Showing 1–20 of 84 reports

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

October 15, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows are dropping into comfortable mid-October levels with clear water and pleasant weather. Midday hatches of Mahogany Duns and Blue Winged Olives should draw trout between 10 a.m. and 2 p.m.

2,500 cfs ↓

October 12, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Fall fishing on the South Fork means dropping flows and strong nymph-and-dry action on Mahoganies and BWOs. Mid-day is prime time as overcast skies trigger consistent rises.

3,580 cfs

October 11, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Box Canyon to Riverside

Flows at 159 cfs are extremely low, but streamer fishing is solid and fall hatches are active with rising fish.

Very low · 159 cfs

October 10, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows hold steady at a comfortable fall level with clear water and active hatches, but incoming rain will push turbidity into upper reaches by weekend.

4,050 cfs

October 8, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

South Fork is running 4,120 cfs at normal levels with stable flow and clear skies through Friday. Rain and cloud cover arrive Saturday, pushing mayfly hatches and aggressive streamer fishing.

4,120 cfs

October 6, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Low reservoir levels and dropping flows have made nymphing and dry-dropper tactics the go-to approach on the South Fork right now.

4,120 cfs

October 5, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River

Gin-clear water and low flows make the Henrys Fork challenging, with heavy Blue-Winged Olive hatches and an incoming storm system expected to bring heavier Baetis emergence and temporary discoloration.

658 cfs ↓

October 3, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Box Canyon to Riverside

Low flows at 159 cfs have stabilized on the Henrys Fork with Blue Wing Olives hatching. Fish have concentrated in deeper channels as weed beds expose, making precise placement and attractor patterns more effective.

Very low · 159 cfs

October 1, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

The South Fork is slightly off-color with moss, but fish are feeding actively on small bugs along foam lines. Small Baetis patterns and midges will do the work.

Very low · 1,980 cfs

September 28, 2026

Upper Snake / Eastern Idaho

Henrys Fork of the Snake River, Box Canyon to Riverside

The Henrys Fork runs gin-clear at 159 cfs with fish on high alert, so low and slow is the move. Best dry fly action arrives midday when Mahogany Duns and Blue-Winged Olives are most active.

Very low · 159 cfs

September 26, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Clear water and moderate flows have the South Fork concentrating fish along cutbanks and seams, with Mahogany Duns and Blue Wing Olives driving the midday bite.

September 24, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows around 4,100 cfs have opened up wade access and slowed float times. Fish are working slower banks and foam lines on BWOs and Mahoganies.

September 21, 2026

Upper Snake / Eastern Idaho

South Fork Snake River

Flows are at very low levels and stable. Dry-droppers and nymphing are most productive as the river settles into its autumn pattern.

Very low · 1,840 cfs

September 20, 2026

Upper Snake / Eastern Idaho

Henry's Fork of the Snake River

Flows are low and falling into the off-season range, but clear water and midday olive hatches offer solid midday dry-fly opportunity.

851 cfs ↓

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Next

Upper Snake / Eastern Idaho

Island Park Reservoir

Island Park Reservoir sits at 19% capacity with low outflows as winter approaches, making conditions worth monitoring for anyone planning to fish the area.

Upper Snake / Eastern Idaho

Henrys Lake

Cooler fall temperatures are improving the bite at Henrys Lake, but lower water levels complicate boat launches.

Upper Snake / Eastern Idaho

South Fork Snake River

The South Fork is dropping into a fishable flow with clear water and stable conditions. Fish are concentrated along structure, and multiple hatches offer options for dries and nymphs throughout the day.

4,140 cfs ↑

Upper Snake / Eastern Idaho

Teton River

The Teton offers prime dry-fly fishing in early October with stable flows of 401 CFS and clear skies. Mahogany duns, Blue Wing Olives, and small hoppers are the go-to patterns.

401 cfs

Upper Snake / Eastern Idaho

South Fork Snake River

The South Fork is running very low as Palisades Reservoir sits at 11% capacity, but dry-droppers and nymphing remain effective on overcast fall days.

Very low · 1,920 cfs

Upper Snake / Eastern Idaho

Teton River

The Teton flows near normal with clear water and active fall hatches including caddis, olives, and stoneflies.

497 cfs ↑