Best Flies for Henry's Fork of the Snake River (Idaho)

What's hatching now

Month, insect, size, and pattern from the Henry's Fork of the Snake River 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.

Emerger

PMD Emerger

A trailing-shuck emerger pattern specifically colored to match Pale Morning Dun emergence. The pale yellow bod

Size #14

Nymph

Super Simple Pheasant Tail

Devin Olsen's stripped-down pheasant tail jig — hook, bead, thread, tail, body. No rib, no thorax, no wingcase

Sizes #16–#18

Nymph

Roza's Pink Pheasant Tail

Luboš Roza's pink-headed take on the pheasant tail — a euro nymphing point fly with a metallic pink tungsten b

Sizes #12–#18

Nymph

Pheasant Tail Nymph

Frank Sawyer's Pheasant Tail Nymph is one of the most widely fished subsurface patterns in the world. The natu

Sizes #12–#20

Nymph

Beadhead Caddis Pupa

This simple caddis pupa imitation features a dubbed body with a contrasting thorax and a soft hackle collar su

Sizes #12–#18

Egan's GTi Caddis

A weighted Hydropsychidae (net-builder) caddis larva with a contrasting shellback, designed around Hare-Tron d

Sizes #10–#14

Nymph

Emerger

Emerging Caddis Pupa

This pattern captures the explosive moment when a caddis pupa ascends through the water column and breaks thro

Size #12

Dries

Dries and terrestrials for the Henry's Fork of the Snake River. If the chart says a size 18 PMD, do not start with a 12.

BWO Sparkle Dun

Craig Mathews design. Z-lon shuck, deer hair wing. Size 18-20 for spring BWOs.

Size #14

Dry

Dry

Green Drake

The Green Drake is the biggest mayfly hatch of the year in many western rivers. This large, heavily hackled pa

Size #10

Dry

Callibaetis Cripple

This cripple pattern imitates a Callibaetis mayfly that failed to fully emerge from its shuck — stuck half in,

Size #14

Dry

Sparkle Dun

Craig Mathews' Sparkle Dun combines a deer hair fan wing with a Z-lon trailing shuck, bridging the gap between

Size #14

Dry

Rusty Spinner

A spent-wing spinner pattern that imitates the final stage of the mayfly lifecycle when egg-laying females col

Size #14

Dry

BWO Parachute

The BWO Parachute is a specific-color Adams variant tied to match the ubiquitous Blue-Winged Olive mayfly hatc

Size #16

Dry

Goddard Caddis

John Goddard and Cliff Henry's spun deer hair caddis is the most buoyant caddis imitation ever conceived. The

Size #10

Egan's Corn-Fed Caddis

A heavy-winged CDC caddis dry with a Super Fine dubbed body, Antron shuck, Trigger Point overwing, and a CDC h

Size #12

Dry

Front End Loader Caddis

A hackle-stacker elk hair caddis with a Callibaetis Super Fine body, Glo Brite tag, and grizzly hackle wrapped

Size #10

Dry

Dry

Elk Hair Caddis

Al Troth's Elk Hair Caddis is the definitive adult caddis imitation. The palmered hackle body and tent-shaped

Sizes #12–#18

Dry

X-Caddis

Craig Mathews' X-Caddis omits the hackle of an Elk Hair Caddis, creating a lower-riding fly that hangs in the

Size #14

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. A 3.0–3.8mm tungsten on the point and a lighter dropper is a default until you see the 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 Henry's Fork of the Snake River?

Start with BWO Sparkle Dun and Green Drake, then match size to the hatch chart for the month you are standing in. The Henry's Fork of the Snake River 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 Henry's Fork of the Snake River?

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 Henry's Fork of the Snake River?

Idaho 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 Henry's Fork of the Snake River?

Open the Henry's Fork of the Snake River 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 Henry's Fork of the Snake River?

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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