Jimmy's All Season Anglers in Idaho Falls provides weekly updates on fishing and hatch activity based on their staff on the water time and from many local friends and clients who fish these waters regularly and provide feed back.  This report which is compiled by Bruce Staples covers the waters of Southeast Idaho, Yellowstone Park, and the Southwestern Montana area including the Madison River, Beaverhead and Red Rock River drainages.

 

All fishing is influenced by the local water conditions.  Here is the river flow conditions at a few popular locations on the local rivers that you might want to look at to plan your trip.

 

South Fork at Irwin Cable (near Husky Station)

South Fork at the Heise Cable (near Byington Boat Ramp)

South Fork at the Lorenzo Bridge (this spot is below location where the large irragation canals take a large amount of the river flow for irrigation from mid April to late September.

Snake River at Menan is below the confluence of the North Fork (Henry's Fork) and the South Fork of the Snake River

 

North Fork (Henry's Fork) just below Island Park Dam

North Fork just below Aston Reservoir

North Fork Near Rexburg (below confluence of the Fall River)

 

Fall River Above Yellowstone Canal (closest location to the south boundary of Yellowstone Park)

 

If your favorite fishing water is not listed, go to the USGS Site to see if they have the data that you are looking for. 

  

Jack Dennis Outdoor Sports in Jackson Hole Wyoming provides information on fishing and river conditions in that area.