Kootenai River

September 10, 2026

By Barbless, compiled each morning from the gauges, forecasts and sources on this page.

Kootenai River

Current conditions for Kootenai River · Map, access and gauges

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Flow

5,810 cfs ↑

Water Temp

59°F · Prime temp

Trend

Rising

Observed

38d ago

Hatch Status

Good hatches of mayflies and caddis during the day, some Spruce moths, October Caddis expected soon

Conditions

The Kootenai is fishing well with mayflies, caddis, and Spruce moths active through the day. Nymph work near banks, eddies, and riffle tail-outs is productive, while streamer fishing picks up for larger rainbows. Trout commonly run 12-16 inches and include cutthroat, bull trout, and occasional browns. As of September 25, flows were 5,810 cfs at Porthill and water temperature held at 59°F.

Gauges

Techniques

  • Streamer fishing becoming more productive for larger rainbows this time of year
  • Dry fly opportunity expected with warmer temps around 80°F and blue skies this weekend
  • Nymphing productive near banks, eddy seams, and riffle tail outs

Recommended flies

E-Z CaddisTilt Wing DrakePurple HazeWorm FarmImperialJigged Hares EarTungsten Thin MintShe Demon Bugger