South Fork of the Snake River Fly Fishing Report - July 7/19/2025
SOUTH FORK OF THE SNAKE RIVER FLY FISHING REPORT
Idaho's Premier Fly Fishing Destination
Report Date: July 19, 2025 | Next Update: July 26, 2025
Current River Conditions
Excellent conditions for summer fly fishing! Water flows are moderate with clear water providing good visibility. Water temperatures are steady in the low 50s°F, ideal for active trout feeding. The weather is warm and sunny with light wind, favorable for both wading and floating.
Flows & Clarity
Flow Rate: ~1,580 CFS (USGS near Irwin)
Water Clarity: Clear (~3 ft visibility)
Source: Palisades Dam releases stabilized
Flow Rate: ~1,580 CFS (USGS near Irwin)
Water Clarity: Clear (~3 ft visibility)
Source: Palisades Dam releases stabilized
Water Temperature
Current: 52°F (11°C)
Daily Range: 50–54°F
Trend: Stable, perfect for trout activity
Current: 52°F (11°C)
Daily Range: 50–54°F
Trend: Stable, perfect for trout activity
Weather Conditions
Forecast: Sunny, highs near 65°F, lows around 40°F
Wind: Light (less than 5 mph)
Conditions: Warm days with cool evenings
Forecast: Sunny, highs near 65°F, lows around 40°F
Wind: Light (less than 5 mph)
Conditions: Warm days with cool evenings
Access Points
All public accesses open
Boat ramps operational: Conant, Byington, Lorenzo
Road conditions good, wading safe in side channels but main channel current strong
All public accesses open
Boat ramps operational: Conant, Byington, Lorenzo
Road conditions good, wading safe in side channels but main channel current strong
Hatch Chart & Insect Activity
Insect | Size | Activity Level | Prime Time |
---|---|---|---|
Pale Morning Duns (PMDs) | #16–18 | Moderate ⭐⭐⭐ | Morning |
Terrestrials (Ants, Beetles) | #12–16 | Moderate ⭐⭐⭐ | Afternoon |
Caddisflies | #14–16 | Light ⭐⭐ | Evening |
Mayflies (Mahogany Duns) | #14–16 | Light ⭐⭐ | Evening (sporadic) |
Recommended Flies
- Dry Flies: Split Case - PMD (#16–18), Bionic Ant 2.0 - Black (#12–16), Olsen's Foam Front End Loader Caddis - Tan (#14–16), Antonio's Adult BWO (for Blue Wing Olive pattern), Card's Cicada (terrestrial stimulant)
- Nymphs: Pheasant Tail Tungsten (#14–16), Tungsten Split Case Nymph - PMD (#16–18), Black Zebra Midge (TBH) (#18–20), Keslar's Rubberleg Hare's Ear Barbless, Sunny Side Up - Eggs
- Streamers: Coffey's Articulated Sparkle Minnow - Sculpin #4, Mena's Cousin It Jig Streamer - Olive, Cheech Leech Black/Red, Rusty Trombone
Tactics & Tips
Early Morning: Focus on nymphing deep runs and tailouts using Pheasant Tail and PMD patterns with long leaders.
Midday & Afternoon: Switch to terrestrials such as ants and beetles near banks and trailing foam lines for surface feeding trout.
Evening: Casting dry caddis and evening mahogany duns into quieter pools can produce great results.
Streamer Fishing: Effective throughout the day along structure like log jams and deep pools with sculpin and leech imitations.
Use 5-6 weight rods with 9-12 ft leaders to present flies delicately to wary trout.
Midday & Afternoon: Switch to terrestrials such as ants and beetles near banks and trailing foam lines for surface feeding trout.
Evening: Casting dry caddis and evening mahogany duns into quieter pools can produce great results.
Streamer Fishing: Effective throughout the day along structure like log jams and deep pools with sculpin and leech imitations.
Use 5-6 weight rods with 9-12 ft leaders to present flies delicately to wary trout.