From its source on Chickamin Ridge in the Alpine Lakes Wilderness region of the Cascade Range, the Kachess River flows south into Kachess Lake, a natural lake regulated as a reservoir by Kachess Dam.
Originating from its point of origin on Chickamin Ridge within the Alpine Lakes Wilderness area of the Cascade Mountains, the Kachess River moves southward and empties into Kachess Lake, a naturally occurring lake that is managed as a storage facility by the Kachess Dam.