Daily River Forecast

Henry's Fork

Last Chance to Ashton, Idaho

Henry's Fork | Last Chance to Ashton, Idaho | Updated June 15, 2026 | Station: Henrys Fork near Island Park

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How To Fish It

  • Match the section to the day. Lower, more technical water rewards stealth; faster ranch and canyon water can tolerate a little more movement.
  • Fish small nymphs or emergers under a dry in soft seams before you commit to a pure dry-fly setup.
  • Once heads show, lengthen the leader, pick one fish, and avoid false casts over the lane.

Bugs & Best Matches

What's active
Fish this
Blue-winged olives, size 18-20, midday through afternoon
CDC BWO Emerger, size 18-20, emerger; BWO Sparkle Dun, size 18-20, dry
Midges, size 20-24, morning and calm periods
Zebra Midge, size 20-22, nymph; RS2 gray, size 20-22, emerger
Caddis prep and pupa activity, size 14-16, late afternoon in lower reaches
Pheasant Tail thin, size 18-20, nymph
General subsurface
Griffith's Gnat, size 20-24, dry

Current Conditions

FlowTailwater influence keeps some reaches stable, but different sections of the Fork fish very differently on the same day.
Water TempSpring temperatures usually build slow, which puts the most consistent feeding window from late morning into the afternoon.
WeatherFlat light and cloud cover make the best BWO days. Bright sun narrows the surface window.
Rating7/10

Today's Feeding Pattern

Henry's Fork trout feed in classic technical-water fashion this time of year: steady but selective when the bugs are there, cautious when they are not. Fish hold in slow seams, springy edges, and shallow flats where emergers drift naturally. If you rush the presentation or land too close, you will put them down fast, especially in the Railroad Ranch-style water.

About The Henry's Fork

Henry's Fork is one of the best-known dry-fly rivers in the West, with famous technical water from Last Chance down through the Ranch and beyond. The river blends spring-creek precision with freestone and tailwater characteristics depending on the section.

Rainbow trout are the headline species, with strong bug life built around midges, baetis, caddis, and larger summer hatches. Even when fish are feeding well, presentation discipline is part of the price of admission.

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