Best Flies for Kootenai River (below Libby Dam) (Montana)

What's hatching now

Month, insect, size, and pattern from the Kootenai River (below Libby Dam) hatch chart. August is highlighted when that month exists in the chart. We do not invent a hatch that is not on the chart.

Nymphs

Subsurface patterns matched to this river's chart and catalog. Fish them at the size the chart lists, not the size that looks good in the bin.

• 

  Zebra Midge

  #16

• 

  RS2

  #18

• 

  PMD Emerger

  #14

• 

  Beadhead Caddis Pupa

  #12–#18

• No photograph

  Egan's GTi Caddis

  #10–#14

• 

  Emerging Caddis Pupa

  #12

Dries

Dries and terrestrials for the Kootenai River (below Libby Dam). If the chart says a size 18 PMD, do not start with a 12.

• 

  Griffith's Gnat

  #18

• No photograph

  BWO Sparkle Dun

  #14

• 

  BWO Parachute

  #16

• 

  Comparadun

  #12

• 

  Sparkle Dun

  #14

• 

  Goddard Caddis

  #10

• No photograph

  Egan's Corn-Fed Caddis

  #12

• No photograph

  Front End Loader Caddis

  #10

• 

  Elk Hair Caddis

  #12–#18

• 

  X-Caddis

  #14

• 

  Foam Ant

  #14

• 

  Foam Beetle

  #12

Streamers

Streamers and wets for stained water, banks, and low light. This is not a claim that streamers are "on" today.

No catalog patterns in this group yet. Use the hatch chart and the river guide.

Setup

5X and 6X fluorocarbon on nymphs, 5X on dries unless the fish are on Tricos, then 6X or 7X. Start lighter than your home river. One small tungsten and a long tag often beats a 3.5mm bead in clear water. Tight-line the near bank and the heads of pockets. Use an indicator only when you need to search water you cannot euro.

FAQ

What flies work on the Kootenai River (below Libby Dam)?

Start with Griffith's Gnat and Zebra Midge, then match size to the hatch chart for the month you are standing in. The Kootenai River (below Libby Dam) does not need a 40-pattern box. It needs the right size on the insect that is actually in the drift.

When is the best time to fly fish the Kootenai River (below Libby Dam)?

The editorial window we list is June, July, August, September, October. That is a planning month range, not a guarantee. Shoulder months can fish well if flows and water temperature cooperate.

Do I need a guide on the Kootenai River (below Libby Dam)?

Montana has walk-up wade water and, on some sections, float water. A guide is worth it for a first float or a technical tailwater. A hatch chart and a gauge are enough for a first wade if you already nymph. We list local guides and shops on this page when we have them.

Where can I see live flow for the Kootenai River (below Libby Dam)?

Open the Kootenai River (below Libby Dam) river page for the USGS gauge, access notes, and the same hatch chart this fly list is built from. We do not publish other people's spots or fish counts.

Is this a report of what's working now on the Kootenai River (below Libby Dam)?

No. Executive Angler does not publish other anglers' catches, GPS, or a crowdsourced hot fly. This page is hatch-chart patterns plus catalog flies. Presence on the river page is gauge and weather only.

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