Last Chance to Ashton, Idaho

Henry's Fork Fishing Report

Updated Apr 24, 2026, 8:03 AM MDT

Keep the first part of the day tight and technical with midges and baetis, then look for better afternoon surface feeding if the light stays soft.

Current Conditions

Flow: Tailwater influence keeps some reaches stable, but different sections of the Fork fish very differently on the same day.
Water Temperature: Spring temperatures usually build slow, which puts the most consistent feeding window from late morning into the afternoon.
Weather: Flat light and cloud cover make the best BWO days. Bright sun narrows the surface window.
Overall Rating: 7/10

Today's Read

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.

What Fish Are Doing

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.

Best Flies In The Current Report

CDC BWO Emerger, size 18-20, emerger
RS2 gray, size 20-22, emerger
Zebra Midge, size 20-22, nymph
Pheasant Tail thin, size 18-20, nymph
BWO Sparkle Dun, size 18-20, dry

What Is Driving The Feed

Blue-winged olives, size 18-20, midday through afternoon
Midges, size 20-24, morning and calm periods
Caddis prep and pupa activity, size 14-16, late afternoon in lower reaches