Daily River Forecast

Henry's Fork

Last Chance to Ashton, Idaho

Henry's Fork | Last Chance to Ashton, Idaho | Updated September 13, 2026 | Station: Henrys Fork near Island Park, ID

  • Target slow-moving spring creek currents and grassy undercut banks with delicate, drag-free presentations.
  • Use Dry-dropper.
  • Favor High-visibility foam on top with a sparse, unweighted nymph or emerger trailer..
What's active
Fish this
Baetis, size 16-20, Morning (6:00 AM–10:00 AM)
Blue Winged Olive Parachute, size 16-20, dry; Sparkle Dun, size 16-20, dry; Pheasant Tail Nymph, size 16-20, dry
Midges, size 18-22, Morning (6:00 AM–10:00 AM)
Zebra Midge, size 18-22, dry; Griffiths Gnat, size 18-22, dry; Disco Midge, size 18-22, dry
Terrestrials, size 14-16, Morning (6:00 AM–10:00 AM)
Parachute Hopper, size 14-16, dry; Daveys Hopper, size 14-16, dry; Foam Beetle, size 14-16, dry
Caddis, size 14-18, Variable
No matching fly supplied
Tricos, size 20-24, Variable
No matching fly supplied
Flow1,150 cfs and falling
Water TempUnavailable
WeatherClear Night
Rating7/10 · Good

Clear water and cool morning air on a productive spring creek make a dry-dropper rig ideal for targeting rising or subsurface-feeding trout.

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.