Idaho Spring creek
Henry's Fork of the Snake Fishing Report, Flows and Hatches
The Railroad Ranch and Last Chance flats below Island Park Dam, the spring-creek water that made Henry's Fork famous. Slow, glassy, volcanic-fed currents and famously selective rainbows that demand a careful drift over green drakes and PMDs.
Spring creek
Idaho
6,230 ft
Gauge 13042500
Right now
Live conditions
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The hatch chart
Henry's Fork of the Snake hatch chart
The emergences that come off the Henry's Fork of the Snake by month, straight from the Rivus hatch model.
| Hatch | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Midge Midge, #18-22 | ||||||||||||
Caddisfly Caddis, #14-16 | ||||||||||||
Blue Winged Olive Mayfly, #14-20 | ||||||||||||
Salmonfly Stonefly, #4-6 | ||||||||||||
Green Drake Mayfly, #8-12 | ||||||||||||
Brown Drake Mayfly, #10-12 | ||||||||||||
Golden Stonefly Stonefly, #6-10 | ||||||||||||
Little Yellow Sally Stonefly, #14-16 | ||||||||||||
Pale Morning Dun Mayfly, #14-16 | ||||||||||||
Trico Mayfly, #18-22 | ||||||||||||
Callibaetis Mayfly, #14-16 | ||||||||||||
Grasshopper / Terrestrial Hopper, #8-12 | ||||||||||||
Flying Ant / Carpenter Ant Ant, #14-18 | ||||||||||||
Terrestrial Beetle Beetle, #14-16 | ||||||||||||
Mahogany Dun Mayfly, #14-16 |
How it fishes
A Idaho spring creek
A spring creek wells up from the ground at a near-constant temperature, so it stays clear, cold, and stable through the year. The water is rich and the fish see everything, which makes for technical, small-fly fishing and long, fine leaders.
Flow and gauge
Reading the flows
The Henry's Fork of the Snake is metered at USGS gauge 13042500. Watch the trend as much as the number: a river that is dropping and clearing fishes very differently from one that is coming up.
Low
under 400 cfs
Optimal
400 to 800 cfs
High
above 1,000 cfs
Access and regulations
Before you fish
Access and the right to fish are the angler’s responsibility, every time. Public access, private water, and seasonal closures vary along the river, so confirm where you can legally stand and wade before you go. We do not point you to a specific spot.
Read the current rules, license requirements, and any special-regulation water before you go. Regulations change season to season, so check them fresh.
Flow and water temperature from USGS, weather from NWS and NOAA, refreshed hourly. Real-time USGS readings are provisional and subject to revision. The hatch chart and river read are Rivus model output.