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Idaho Rivers › Eastern Idaho
Premier Idaho trout water with diverse seasonal hatches.
Major North Idaho river in Boundary County — Libby Dam tailwater canyon floats (Leonia to Bonners Ferry) and the free-flowing reach north to the Canadian border at Porthill. Primarily a drift-boat fishery with limited bank access. Nutrient enhancement and instream habitat work have improved trout and whitefish populations. IDFG special rules: trout limit 2, no Rainbow or Cutthroat Trout under 16 inches; sturgeon fishing illegal.
Best Season
May – October
River Type
Freestone
Skill Level
Beginner – Intermediate
Best Techniques
Dry Flies, Nymphing
Access
Moderate
Explore fish species associated with the Kootenai River. Each profile includes identification tips, habitat notes, and practical fishing guidance for Idaho anglers.
Review seasonal insect hatches on the Kootenai River, including timing windows and fly pattern suggestions for Idaho fly fishing.
Check current seasons, limits, and special rules for Kootenai River before you go. Regulations change — always verify with IDFG.
The latest fishing conditions and hatch notes for Kootenai River. Older reports live in the Kootenai River report archive.
These YouTube videos have been hand-curated by our team because we feel they best represent the Kootenai River fishery. Watch for river character, access context, and techniques that translate to your next Idaho trip.
66.9 KB · Kootenai_River_Hatch_Chart.pdf
A hatch chart from KRO.
Source: Kootenai River Outfitters
Map data © Mapbox © OpenStreetMap
The Kootenai River supports 7 fish species in our Idaho fishing catalog. Browse each profile for identification tips, seasonal patterns, and how these species are managed on this water.
Today's day score from live flow, weather, and water temperature where gauges allow — not a guarantee, a planning signal.
The Kootenai River has 13 documented insect hatches across spring, summer, fall, and winter. Review seasonal timing and recommended fly patterns to plan productive days on this Idaho water.
These YouTube videos have been hand-curated by our team because we feel they best represent the Kootenai River fishery. Watch for river character, access context, and techniques that translate to your next Idaho trip.
Fishing guides, outfitters, shuttles, and shops that operate on the Kootenai River.
The latest fishing conditions and hatch notes for Kootenai River. Older reports live in the Kootenai River report archive.
The Kootenai is running steady with unusually cool water and strong dry fly action on mayfly and evening caddis hatches.
Today's day score from live flow, weather, and water temperature where gauges allow — not a guarantee, a planning signal.
Track record builds after 30 graded days.
Bite forecast · Kootenai River
2026-09-03 · Full confidence
How was it?
Were you on the water today? Rate the fishing in two taps — your feedback grades this day score over time.
Prime 6 AM – 12 PM (peak 8.4)
Secondary 9 PM – 10 PM
Peak at 8:00 (score 8.4). Helping: wtemp, light, cloud. Hurting: flow.
Since 2026-08-31
Flow trend
down 18% over 7 days
Hatch forecast
Degree-day model · some taxa claim-updated (persisted)
Uncalibrated seed
Uncalibrated seed
Claim-updated · n=2
Rigs & patterns
From recent technique and hatch reports — not a prescription.
Hopper
hatchHoppers remain the staple in trout's diet, along with smaller nymphs
House of Fly · 2026-08-21
Suggested rig
techniqueStraight up nymphing with a bobber and two flies is working
House of Fly · 2026-08-21
hopper · nymph
techniqueHopper/dropper is still performing best with a nymph below it, 3' to 4' deep
House of Fly · 2026-08-13
Flow
0cfs
down 18% over 7 days
Water temp
58 → 58 °F
14.2 → 14.4 °C · Measured USGS
Weather
54 → 68 °F
Low 6 AM · high 5 PM
Partly cloudy · PoP 39%
Wind 1–11 mph · gusts 22
↑ Rising · 949 hPa
Field intel
Extracted facts from recent shop/guide reports — not rewritten prose.
9,640 CFS @ Leonia
Water temp 56 degrees
Hoppers remain the staple in trout's diet, along with smaller nymphs
Straight up nymphing with a bobber and two flies is working
Smaller mayfly dries are also working
Caddis have been hatching in the evenings
Kokanee starting to show up as they prepare for the spawn, typically larger class of rainbow trout follows
Hopper/dropper is still performing best with a nymph below it, 3' to 4' deep
Other sources
Live gauges and weather inputs behind this forecast.
