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 970 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 970 CFS at the Near Island Park gauge.

Henry's Fork Fly Fishing Conditions

Live Conditions

Henry's Fork — Near Island Park

Fishable

970CFS

Discharge

4.48ft

Gauge Height

—

Water Temp

Updated 37 min agoView on USGS ↗

7-Day Flow

→ Stable

RisingFallingStable

24-Hr Pressure

23.98 inHg · → High/stable

Falling (good)RisingHigh/stable

Local Weather

71°FClear sky

Wind 8 mph23.98 inHg Low & stable

Tough conditions — fish deep

Today

☀️

Clear sky

85° / 49°

Tomorrow

☀️

Clear sky

74° / 50°

Tue

☀️

Clear sky

77° / 49°

Wed

☀️

Clear sky

84° / 48°

Cold front incoming — go deep with nymphs, surface activity likely slow.

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: 970 CFS · PMDs continue

What should I pack?

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

🪰 Hatch Calendar

Henry's Fork · August · Late Summer

Full calendar →

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

Select month

JanDec

PMDs continue (size 14-16). TRICOS (size 22-24) at peak — Henry's Fork tricos are legendary, dawn spinner falls over flat water. Callibaetis (size 14-16) in slower sections. Match the hatch precisely.

PMDTrico

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.