Fly fishing · Idaho
Idaho trout rivers: hatch charts + live conditions
12-month hatch grids, live USGS readings, top-3 fly picks for each river.
ID · Island Park / Last Chance · Blue Ribbon
Henry's Fork
rainbow trout · brown trout
The Railroad Ranch reach through Harriman State Park is among the world's greatest dry-fly fisheries. Giant rainbows rising to PMDs and Green Drakes on flat, clear water. Highly technical; catch-and-release throughout the park section.
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ID · Sun Valley / Picabo · Blue Ribbon
Silver Creek
rainbow trout · brown trout
Spring creek near Hemingway's Sun Valley. Crystal clear, spring-fed water with massive, selective trout. TNC Preserve section open to permit holders. PMD and trico hatches dominate. Ultra-technical presentation required.
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ID · Boise / Anderson Ranch · Tailwater
South Fork Boise River
rainbow trout · bull trout
Cold tailwater below Anderson Ranch Dam. Strong midge and PMD hatches. Bull trout present; handle carefully. Excellent year-round fishing with consistent flows.
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ID · Central Idaho · Wild trout
Salmon River
rainbow trout · chinook salmon · steelhead
The River of No Return, a wilderness canyon river through central Idaho. Wild steelhead and chinook runs. Summer rainbow trout fishing in the canyon. Float trips through the Frank Church Wilderness.
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About these charts
Each river page shows a 12-row × N-column hatch grid (month × active patterns), live water temp and flow from USGS streamgages, the top 3 fly picks for the current month, and FAQ-style answers to the questions we get asked most.
Hatch timing is hand-curated from regional fly shop calendars and angler logs. Always confirm current regulations with your state authority. If something's off, tell us.
Prefer a map? See the Idaho spot map for access points and directions, or try the fly recommender.