South Fork Snake River

September 21, 2026

By Barbless, compiled each morning from the gauges, forecasts and sources on this page.

South Fork Snake River

Current conditions for South Fork Snake River · Map, access and gauges

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Flow

Very low · 1,840 cfs

Trend

Steady

Observed

25d ago

Hatch Status

Hatches of Mahoganies and BWOs, especially on overcast days.

Conditions

Palisades Reservoir is drawing down hard at 11% capacity, and the South Fork has followed suit. As of September 23, the Lorenzo gauge showed 1,840 cfs and holding stable after a continuous drop from the dam's 4,400 cfs outflow. A dropping river can open new water as fish relocate into shallower edges, so consider heavier line and bigger attractors as flows settle. Dry-droppers and nymphing are your most productive tactics right now, with Mahoganies and BWOs especially active on overcast days alongside caddis and terrestrials.

Gauges

Techniques

  • Dry Droppers, streamers, and Nymph Rigs
  • Dry-droppers and nymphing have been the most productive.
  • Parachute Pheasant Tail in sizes 16-20.
  • TH Skinny Quill Nymph BWO in sizes 16-20.
  • Higa's S.O.S. in sizes 12-18.
  • Schroeder's Parachute Hopper in Tan, sizes 8-14.
  • Tunghead Pheasant Tail Jig in sizes 14-18.
  • Improved Winged K.C.'s Creature in Golden, sizes 6-10.
  • Pat's Rubberlegs in Brown/Black/Orange, sizes 4-12.
  • Kreelex in Black, sizes 4-6.
  • Quill Body Jigs in Purple/Orange/Black, sizes 10-16.
  • Dungeon!!! in Black, White and Olive, size 4.

Recommended flies

Improved Winged K.C.'s CreatureParachute Pheasant TailHiga's S.O.S.Schroeder's Parachute HopperTunghead Pheasant Tail JigTH Skinny Quill NymphPat's RubberlegsQuill Body JigsKreelexDungeon!!!