The Lower Yuba River has what I would classify as a minor population of little yellow stoneflies.
The Upper Yuba River and the Truckee River has a major population. For this reason geting to know the The Little Yellow Stonefly is a good idea. The “Isoperla” nymphs live in riffles and rocky runs with moderate to fast flows. They are sometimes knocked loose and drift in the current, so a nymph imitation can be sometimes be productive when dead-drifted through riffles and runs.
The “Isoperla” nymphs live in riffles and rocky runs with moderate to fast flows . . .