Henrys Fork of the Snake River

September 20, 2026

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

Henry's Fork of the Snake River

Current conditions for Henrys Fork of the Snake River · Map, access and gauges

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Flow

851 cfs ↓

Trend

Falling

Observed

27d ago

Hatch Status

Blue-Winged Olive (Baetis) #20-22 moderate activity 11 AM - 2 PM

Conditions

Flows have fallen to 851 cfs as of September 27 and are trending lower into the off-season range. Water remains clear, though overnight showers could add color by morning, so check clarity before rigging. Midday will belong to blue-winged olives (11 AM–2 PM) and mahogany duns (12 PM–3 PM) in the #20–22 and #16–18 range; consider parachute patterns and tungsten nymphs. Afternoon brings light activity in terrestrials and grasshoppers, with midges and caddis bookending the day. If water turns off-color, focus lower flats and keep your approach tight to avoid spooking fish in the weed beds.

Gauges

Techniques

  • 11 AM - 2 PM: switch to dry flies as fish begin rising in the flat, weedy meadow sections
  • 7 AM - 9 AM: high-stick rubber legs and zebra midges through the deeper runs before the sun hits the water

Recommended flies

Parachute Blue Wing Olive #22Carlson's Purple Haze (Poly Wing) #18Juju Baetis Tungsten #22Top Secret Baetis #16Olsen's Pheasant Tail Nymph Doppleganger Brown Barbless #20Tungsten Pat's Rubber Legs Tan & Brown #6Bionic Hopper Tan #12Bionic Ant 2.0 Black #16Black Zebra Midge #20Corn-fed Caddis (CDC) Olive #20Egan's Silver Bullet Baetis #14Guides Choice Hare's Ear #18