 It flows into the Deschutes from the east at Cove Palisades State Park.Both rivers merge into the Deschutes River, becoming part of Lake Billy Chinook, the reservoir created by the Round Butte Dam.The native plant life of Central Oregon can be divided between the Ponderosa forests at the foot of the Cascades, and the smaller Western Juniper forests to the east, with the Deschutes River being a rough boundary between the two.