MARGINAL
Winter fishing in open sections only—flows at 195 CFS near Island Park (56% of normal), 1,310 CFS near Ashton. Ranch section closed until June 15.Henry's Fork
Current Hatch Activity
Midges dominating winter hatches—best activity during warmest midday hours. Fish Zebra Midges #20-24, small Pheasant Tails #18-20, and rubberlegs in Box Canyon. Streamers fished low and slow are producing in deeper seams near Ashton. Water temps 32-39°F; fish are sluggish, so slow presentations are key.
MARGINAL
Zebra Midge #20 + Pheasant Tail #18 on Euro nymph rig, or streamer fished low and slow in deeper seams
Quick Reference
300-800 CFS ideal in upper sections. Box Canyon handles higher flows (800-2,000 CFS). Low winter flows concentrate fish.
42-58°F optimal. Spring-fed origins keep temps stable. Ranch section can warm in summer.
Multiple distinct sections with different characters. Railroad Ranch is catch-and-release, fly-only. Box Canyon handles more flow. Winter closures affect some areas.
Exceptional clarity due to spring-fed origins. The Ranch offers sight-fishing opportunities unmatched in the West.
What "Fishable" Means Here
One of the most technical dry fly rivers in America. The Ranch section demands perfect presentations to educated fish. Box Canyon offers more forgiving pocket water. Check seasonal closures—some sections closed Dec 1 through June 14.
Seasonal Patterns
spring
Opens June 15 in restricted sections. Pre-runoff fishing in open sections can be excellent. Green Drake and PMD hatches start in late June. This is when the Henry's Fork earns its reputation.
summer
Prime time July through August. Green Drakes, PMDs, Flavs, and Tricos create match-the-hatch scenarios. Early morning and evening produce best. The Ranch rewards patient, precise anglers.
fall
September through November offers excellent fishing with smaller crowds. BWOs and October caddis provide consistent hatches. Fish feed aggressively before winter closures.
winter
Some sections closed Dec 1 through June 14. Open sections fish well with midges and small nymphs. Box Canyon remains productive. Check current regulations carefully.
Alerts
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Weekly flow updates and fishing intel.
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