Daily River Forecast

Henry's Fork

Last Chance to Ashton, Idaho

Henry's Fork | Last Chance to Ashton, Idaho | Updated October 29, 2026 | Station: Henrys Fork near Island Park, ID

  • Use a long, fine leader with a delicate presentation in slow spring creek runs. Keep dead drifts drag-free.
  • Use Subsurface Technical Nymphing.
  • Favor Small, unweighted, realistic silhouettes with micro-beads.
What's active
Fish this
Midges, size 18-22, Afternoon (2:00 PM–6:00 PM)
Zebra Midge, size 18-22, nymph; Griffiths Gnat, size 18-22, dry; Disco Midge, size 18-22
BWOs, size 16-20, Afternoon (2:00 PM–6:00 PM)
RS2, size 16-20, emerger; Pheasant Tail, size 16-20, nymph; BWO Sparkle Dun, size 16-20
Caddis, size 16-18, Afternoon (2:00 PM–6:00 PM)
Green Larva, size 16-18; Elk Hair Caddis, size 16-18, dry; Caddis Pupa, size 16-18, nymph
Scuds, size 14-18, Evening (6:00 PM–10:00 PM)
No matching fly supplied
Little Black Stones, size 16-18, Midday (10:00 AM–2:00 PM)
No matching fly supplied
Flow84 cfs and falling
Water TempUnavailable
WeatherClear Night
Rating6/10 · Fair

Clear, cold late-October conditions on the Henry's Fork mean trout will be feeding softly beneath the surface. Midges and small Baetis nymphs offer the most reliable subsurface opportunities.

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.