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Idaho fly fishing

Snake River

Fly fishing the Snake River in Idaho, from cutthroat water below Palisades Dam to smallmouth bass at American Falls.

  • 1,506 miRiver length
  • Mar–AprBest season
  • 8Game fish
  • 313Access points
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About the Snake

The Snake River is a huge river with more than one personality. In Idaho, fly anglers know it best for the South Fork below Palisades Dam. That tailwater runs more than 60 miles to the Henrys Fork near Menan, and Highway 26 follows much of it. The Snake carries Gold Medal and Wyoming Yellow Ribbon designations.

The fish are Yellowstone cutthroat, Snake River cutthroat, redband trout and bull trout. Farther down the river you will also find Chinook salmon, smallmouth bass, common carp and white sturgeon. Cutthroat and bull trout have special rules in many places, so read the current Idaho regulations before you fish.

Floating is the main way to fish the South Fork. Popular ramps include Byington, Conant, Lorenzo and Menan. The headwaters in Wyoming offer good wading. Below Jackson Lake the river is best floated through Jackson Hole, and the fish get bigger as you go downstream. The Henrys Fork is close by if you want a different kind of water.

The river is known for salmonflies and golden stoneflies in early summer, plus pale morning duns, blue-winged olives, March browns, skwalas and midges at other times. Hopper season and the October caddis round out the year. March and April bring fewer people. August and September are the busiest, and dry fly fishing picks up in early July.

Smallmouth bass anglers should look at Massacre Rocks State Park near American Falls and Hells Gate State Park near Lewiston.

Fish you'll catch

Tap a fish to see every Idaho river that holds it.

Yellowstone Cutthroat Trout
Snake River Cutthroat Trout
Redband Trout Bull Trout Chinook Salmon
Smallmouth Bass
Common Carp
White Sturgeon

Hatching in November

What's on the water in the Salmon watershed this month, and the fly to match.

Blue-Winged Olive
Mayfly
#18-22, CDC Dun
44–58°F
All 10 hatches this year
Midge
Midge
#22-26, Zebra Midge
34–65°F
Blue-Winged Olive
Mayfly
#18-22, CDC Dun
44–58°F
March Brown
Mayfly
#12-14, March Brown
52–62°F
Skwala Stonefly
Stonefly
#8, Skwala Adult
44–54°F
Pale Evening Dun
Mayfly
#14-16, PED Comparadun
56–68°F
Salmonfly
Stonefly
#4-6, Stimulator
50–60°F
Golden Stonefly
Stonefly
#6-8, Elk Hair Stone
55–65°F
Pale Morning Dun
Mayfly
#16-18, Sparkle Dun
55–68°F
Hopper Season
Terrestrial
#10, Parachute Hopper
65–78°F
October Caddis
Caddis
#8, Orange Stimulator
48–58°F

Light bars show the season and dark bars the peak. The ringed month is this month.

Tips for fishing the Snake

  • Float it with a guide the first time

    The South Fork is big, fast and deep in places. A guide shows you the channels, the ramps and the water worth stopping to wade.

  • Plan around the crowds

    March and April are quieter. August and September are the most popular months, so book ramps and shuttles early.

  • Carry the classics

    Woolly Buggers and Elk Hair Caddis are local favorites. Add stonefly and hopper patterns for summer.

  • Try the bass water

    The lower Snake is an excellent smallmouth fishery. Poppers and baitfish streamers work well around rocks and slow edges.

  • Handle protected fish with care

    Bull trout and cutthroat have special rules in many sections. Keep them in the water and release them quickly.

Every access point on the Snake, in your pocket.

  • 313 mapped access points, with parking and put-ins
  • Today's Fishability score, so you fish the day that lines up
  • 7-day flow and water-temp trends for every gauge on the river
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Snake River FAQ

What is the best time to fly fish the Snake River in Idaho?

March and April are quiet and August and September are the most popular. Early July is when dry fly fishing takes off. Smallmouth bass fishing is a warm season thing.

Where can I fly fish the Snake River in Idaho?

The South Fork between Palisades Dam and Menan is the best known stretch. Smallmouth water sits near American Falls and Lewiston. The app map shows access points along the river.

Can you wade the Snake River?

Yes in places. The headwaters wade well and so do many spots near access points on the South Fork. Much of the South Fork is deep and swift, so most anglers float it.

What flies work on the Snake River?

Woolly Buggers and Elk Hair Caddis are local favorites. Salmonfly and golden stonefly patterns shine in early summer, and pale morning dun and blue-winged olive patterns cover the mayfly hatches. The FlyFishFinder app shows what is hatching and working on the Snake River today.

What fish are in the Snake River?

Yellowstone cutthroat, Snake River cutthroat, redband trout, bull trout, Chinook salmon, smallmouth bass, common carp and white sturgeon.

Are there special rules on the Snake River?

Yes. Rules change by section and by species, and cutthroat and bull trout are protected in many places. Check the current Idaho and Wyoming regulations before you go.

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