Utah Fish Report
Snake River- South Fork Fish Report for 9-19-2025


The flow near Irwin is at 8030 CFS, with some fluctuations still occurring

Snake River- South Fork - ID


by Mike Lawson
9-19-2025
208-558-7525
Website

The flow near Irwin is at 8030 CFS, with some fluctuations still occurring. Streamer fishing has likely been the best method of going about things on the South Fork, with deeper nymph rigs and hoppers/beetles also being productive. Mutant stones are continuing to slow, but the early riser may still be able to find some fish looking up before daylight. 




More Reports

Henry's Fork Anglers Reports
for Friday, September 19th

Henrys Fork- Box Canyon : The upper river is coming out of Island Park Reservoir at 345 CFS
Henrys Fork- Warm River to Ashton: The lower Henrys is flowing at 1010 CFS near Ashton

Henry's Fork Anglers Reports
for Friday, August 22nd

Henrys Lake: Flows from Island Park Reservoir are now holding steady around 780 CFS
Henrys Fork- Ashton to St Anthony: Hopper fishing remains strong, especially through the mid and lower stretches
Snake River- South Fork: The hopper bite is excellent right now
Madison River : The Madison is in late-summer mode—hopper/dropper rigs are the go-to for covering water
Teton River: The upper Teton continues to fish well with PMDs and terrestrials
Yellowstone Fish Report: Warm water closures remain in place for the Madison, Firehole, and Gibbon