Kachess Lake
General data
- Name: Kachess Lake
- Water system: Columbia River
- Water type: Artificial lake
- Progression: Kachess River -> Lake Easton -> Yakima River -> Lake Wallula -> Columbia River -> Columbia River Estuary -> Pacific Ocean -> Planet Earth
- Climates: Mountain
- Continents: North America
- Countries: United States of America
Kachess Lake is a lake and reservoir along the course of the Kachess River in Kittitas County, Washington, United States.
The upper part of the lake, north of a narrows, is called Little Kachess Lake.
The Kachess River flows into the lake from the north, and out from the south.
Kachess Lake is the middle of the three large lakes which straddle Interstate 90 north of the Yakima River in the Cascade Range.
The other two are Cle Elum Lake, the easternmost which is also north of I-90 and Keechelus Lake, the westernmost, which is south of I-90.
Kachess Lake is part of the Columbia River basin, the Kachess River being a tributary of the Yakima River, which is a tributary to the Columbia River.
