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Upper Snake / Eastern Idaho

Idaho’s most famous trout rivers, from the Ranch to the South Fork.

Eastern Idaho contains some of the best-known trout water in the West, along with smaller rivers that receive far less attention. Track flows, hatches, reports, and access across the Henrys Fork, South Fork Snake, Teton, Fall, Warm, Big Lost, and Little Lost rivers.

Rivers

6

Recent reports

48

Last updated

August 26, 2026

Rivers

Latest by river

DateRiverConditions
August 26, 2026South Fork Snake RiverFlows 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.
Covers Aug 26–Sep 2Big Lost RiverLow, clear water makes the Big Lost accessible but demands stealth and smart timing. Fish the morning window hard when Tricos and small mayflies are active.
August 16, 2026Henrys Fork of the Snake RiverClear water and stable flows are opening up wading on the Henrys Fork, with strong terrestrial and PMD hatches through the day into evening.
August 6, 2026Henrys Fork of the Snake River, Box Canyon to RiversideFlows have dropped to 693 cfs, improving wading. Golden Stones and Gray Drakes are active in Box Canyon, while the middle Ranch and lower sections offer solid fishing with multiple mayflies and terrestrial opportunities.
August 6, 2026Henrys Fork of the Snake River, Riverside to Mouth / terminusThe Henrys Fork's lower section is fishing well with stable flows around 1300 cfs. Hoppers and Chubbies are producing.
August 1, 2026Teton RiverThe upper Teton is low but fishable with good insect activity; avoid the warm lower stretches where guides are limiting effort to protect stressed fish.