 Below the dam, the river bends northward to Prineville, Oregon, where it is joined by Ochoco Creek from the northeast.Like the North Fork, Ochoco Creek drains the Ochoco Mountains.After Prineville, the Crooked River flows northwest, collecting McKay Creek and several other minor tributaries before emptying into Lake Billy Chinook, an impoundment of the Deschutes River created by Round Butte Dam.