Idaho ·
Henrys Fork Fly Fishing Report - November 1, 2026
HENRYS FORK
ReportNOV 1 — 8, 2026
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Flow
84CFS
HENRYS FORK NR ISLAND PARK ID
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Water Temp
—
Updated 2026-10-31
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Weather
29–43°F
Light Rain
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Clarity
Clear
Check post-storm
Flow is running a very low 84.3 CFS at 2.09 ft gauge height with gin-clear, glass-flat water — expect ultra-spooky fish that punish sloppy presentations. All-day rain today with a high of only 41°F will push a BWO hatch and may trigger midday surface activity, but also demands careful wading to avoid spooking fish in the shallows.
What's Working — Hot Flies
Parachute - Blue Wing Olive #22
#22
Barr's Flashback Emerger - BWO #22
#22
Juju Baetis Tungsten #22
#22
BWO WD-40 #22
#22
Lil Bit Craven - Dark Olive #22
#22
Olsen's Peacock Blowtorch Barbless #22 - 24
#22-24
Olsen's Hare's Ear Blowtorch Barbless #20 - 28
#20-22
Olsen's Quilldigon - Olive - Barbless #22 - 24
#22-24
Black Zebra Midge(TBH) #20
#20
Roza's World Spain Perdigon Barbless #18 - 32
#20
Pheasant Tail Tungsten #20
#20
Egan's CDC Rainbow Warrior #22
#22
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Blue-Winged Olive (Baetis) | 20-22 | Heavy | 11 AM - 3 PM |
| Midge (Chironomid) | 20-24 | Moderate | 9 AM - 12 PM |
| Caddis | 18-20 | Light | 1 PM - 4 PM |
| Pale Morning Dun | 18-20 | Light | 12 PM - 2 PM |
Best Time Window
- 9 AM - 11 AM: Midge activity in the flat pools before the BWO hatch fires — nymph deep and slow with small patterns.
- 11 AM - 3 PM: Prime BWO hatch window under the overcast, rainy skies — switch to emergers and dries for rising fish in the flats.
- 3 PM - 5 PM: Fading light and cooling temps push a final midge flurry — nymph the slower edges and weed bed margins before dark.
Guide's Tip
From the benchWith flows at 84 CFS and water this clear, your approach matters as much as your fly selection. Stay low, wade slowly, and cast from well outside the fish's window — a 12-14 ft leader tapered to 6X or 7X is not optional here, it's mandatory. The all-day rain today is your best friend: overcast skies suppress the fish's wariness and will trigger a prolonged BWO hatch through the midday hours. Focus your efforts on the slow, weedy flats where fish can sip emergers and dries in the film — target individual rising fish with a single upstream presentation and let the fly come to them completely drag-free.
Main Species
Rainbow Trout
Brown Trout
Yellowstone Cutthroat Trout
