What flies are hatching on the Henry's Fork right now?

Current and seasonal hatches on the Henry's Fork include Pale Morning Dun, Trico, Green Drake. Use the AI Hatch Advisor on this page for a live, temperature-aware recommendation.

What's the current flow on the Henry's Fork?

The Henry's Fork is running at 858 CFS at the Near Island Park gauge. Readings update every 15 minutes from the USGS Water Services API.

Is the Henry's Fork fishable today?

Yes — Henry's Fork is rated fishable right now. Current flow is 858 CFS at the Near Island Park gauge.

Henry's Fork Fly Fishing Conditions

Live Conditions

Henry's Fork — Near Island Park

Fishable

858CFS

Discharge

3.95ft

Gauge Height

—

Water Temp

Updated 55 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

23.95 inHg · ↓ Falling

Falling (good)RisingHigh/stable

Local Weather

53°FOvercast

Wind 3 mph23.95 inHg Falling

Good window — fish are feeding

Today

☁️

Overcast

74° / 37°

Tomorrow

🌦️

Drizzle

66° / 47°

0.02"

Fri

❄️

Snow

64° / 47°

0.75"

Sat

🌧️

Rain

56° / 40°

0.1"

Snow in forecast — check road conditions before heading out.

Weather by Open-Meteo · No API key · Updated every 30 min

What should I fish today?

⚡ AI

AI-powered recommendation using today's live flow, temperature, and hatch data.

9

Time of Day

Using: 858 CFS · Tricos continue early month

What should I pack?

Rod, flies, tippet, and safety gear specific to today's Henry's Fork conditions.

🪰 Hatch Calendar

Henry's Fork · September · Early Fall

Full calendar →

Showing typical dates — water temperature data unavailable for live hatch predictions.

Select month

JanDec

Tricos continue early month (size 22-24). BWOs returning strong on cloudy days (size 18-20). Callibaetis still productive. Mahogany Duns (size 16-18) starting late month. Excellent fall fishing.

Blue-Winged OliveTrico

River Map

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USGS Gauge (click for site ID)Fishing Access / SectionScroll to zoom disabled — use map controls

About Henry's Fork

World-famous spring-fed river through the Island Park caldera. Iconic Pale Morning Dun, Trico, Green Drake, and Callibaetis hatches over selective rainbows and brown trout — Harriman Ranch is fly-only catch-and-release.

Pale Morning DunTricoGreen DrakeCallibaetisMidgeBlue-Winged Olive

Regulations

Harriman Ranch (Last Chance to Pinehaven / Osborne Bridge) is fly-fishing only and catch-and-release year-round. Other stretches have variable seasons and tackle rules — check current IDFG regulations before you go.

Learn More

Guides to help you fish Henry's Fork with more confidence.