Main Stem Snake River
If you can stand the cold weather and swishing those guides in water to free ice, the river (running 300 cfs) below American Falls Dam is the most convenient place to fish for now. Just below the dam gets quite crowded with anglers presenting terminal gear of all types (legal and not so legal). Moving on downstream gets one away from this condition, ice and snow permitting. Streamer, fly rod jigs, and woolly bugger types using sinking lines work best.
Fly Patterns to use:
Chan’s Balanced Ruby-Eyed Leech Black/Red
Rowley’s Balanced Leech-Black
Rohmer’s BH Simi Seal Leech Canadian Brown