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Fly Fishing the Henry's Fork

The Henry's Fork of the Snake at Last Chance and Harriman Park is hallowed dry-fly water for its green drake and PMD hatches.

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When to fish

June–September

Best months: June–September

  • Best
  • Off-peak

Green Drake: mid–late June. Pale Morning Dun: June–July.

Today's conditions

Where to fish

Along the Henry's Fork

The Last Chance / Harriman State Park stretch off US-20 is the famous flat-water dry-fly section; wading is allowed, and the river has well-marked public access.

The water

Spring creek

Key hatches

  • Green Drake
  • Pale Morning Dun
  • Brown Drake
  • Trico
  • Blue-winged Olive
Hatch calendar

Conditions

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6-day forecast

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Forecast from the National Weather Service ↗

Key hatches

  • Green Drake (mid–late June)
  • Pale Morning Dun (June–July)
  • Brown Drake (June, evenings)
  • Trico (Aug–Sept)
  • Blue-winged Olive (fall)

Fly shops near the Henry's Fork

Shops and guides that fish the Henry's Fork. See all 36 Idaho shops →

1 fly shop shownHenry's Fork at Island Park

Species on this water

Trout

Nearby towns

Island Park

Rivers nearby

Clearwater RiverCoeur d'Alene RiverSpokane RiverFirehole River
From The Fly Bench

Tie the flies that work on the Henry's Fork

Step-by-step tying recipes & videos for these patterns.

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Gear up on the Henry's Fork

Everything you need before the next trip — rods, lines, leaders, and fly-tying materials.

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The flies that work on the Henry's Fork

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