Kachess River is a tributary of the Yakima River, in the U.S. state of Washington. 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. Below the dam, Kachess River flows south into the Yakima River.
- ^ Derived from Google Earth using GNIS coordinates
- ^ a b c "Kachess River". Geographic Names Information System. United States Geological Survey. September 10, 1979. Retrieved February 5, 2013.