The Lower Sacramento River Rainbow is the base standard of what a wild Rainbow Tout is. The Lower Sacramento River is cold and pure, full of insects. No stressful winters reducing insect hatches to nil. Nope. There are insect hatches all spring, summer, and fall. And in the winter, the Rainbows of the Lower Sacramento eat BWO’s, Salmonfly Nymphs, Eggs, Salmon Fry, and the large volume of midges this river doles out. If you are having a tough fly fishing day on the Lower Sacramento, it’s probably because your flies or lures aren’t in the water long enough or the river flows have come up as they do in the spring (typically June).