Henrys Fork Fly Fishing Guide

Fly fishing guide for the Henrys Fork: Henrys Fork is a famous Idaho trout river with spring-fed and tailwater influences. The river's multiple gauges make reach-specific flow checks much more useful than a single basin-wide estimate.

Common species: Rainbow trout, Brown trout, Cutthroat trout

Live Henrys Fork flow charts

Gauge readings are public monitoring data and should be combined with local regulations, weather, release schedules, and a visual check of safe wading conditions. Readings typically refresh every 15 minutes.

• Henrys Fork Nr Ashton Id — USGS site 13046000 (official station data)
• Henrys Fork At St Anthony Id — USGS site 13050500 (official station data)
• Henrys Fork Nr Rexburg Id — USGS site 13056500 (official station data)
• Henrys Fork Nr Island Park Id — USGS site 13042500 (official station data)
• Henrys Fork Nr Lake Id — USGS site 13039500 (official station data)

Map coverage and access planning

4 named stream reaches are indexed for this guide in the Idaho map dataset.

Open the Henrys Fork stream map · View campgrounds near the river · Read the Idaho hatch chart

Fishing approach

• Four mapped Henrys Fork reaches
• Four USGS stations from Island Park to Rexburg
• Technical dry-fly water and strong seasonal hatch activity

Match the gauge to the reach

Island Park, Ashton, St. Anthony, and Rexburg describe different water. Open the station detail page for the exact location before comparing the reading to a wading plan.

Use the hatch chart to narrow choices

Mayflies, caddis, and midges can all drive feeding. Start with the seasonal chart, then keep a smaller emerger or nymph ready when fish refuse a high-riding dry.

Fly patterns to start with

BWO Sparkle Dun, Parachute Adams, Griffith's Gnat, Hare's Ear Nymph

Idaho Department of Fish and Game

Flow data can be delayed or unavailable. Verify current regulations, access permissions, weather, and safe conditions with the relevant agency before fishing.