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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

7

Recent reports

87

Last updated

October 3, 2026

Rivers

Lakes

Latest by river

DateRiverConditions
October 3, 2026Henrys Fork of the Snake River, Box Canyon to RiversideLow 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.
October 3, 2026South Fork Snake RiverThe 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.
October 3, 2026Teton RiverThe 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.
Covers Sep 30–Oct 7Big Lost RiverPlan to fish the Big Lost in the afternoons next week when water warms. Flows are dropping across the system, creating good opportunities in shallow seams and deeper runs.
September 20, 2026Henrys Fork of the Snake RiverFlows are low and falling into the off-season range, but clear water and midday olive hatches offer solid midday dry-fly opportunity.
September 19, 2026Snake River, Osgood Diversion Dam to Henrys ForkClear water and excellent visibility are bringing strong terrestrial action along structure. Focus cut banks and willow edges as fish move off mid-river bars.
August 30, 2026Henrys Fork of the Snake River, Riverside to Mouth / terminusThe lower Henrys Fork is in good shape with stable late-summer flows and fall conditions favoring streamers and nymphs.