Alder Lake (Washington)
General data
- Name: Alder Lake (Washington)
- Water system: Nisqually River
- Water type: Artificial lake
- Progression: Nisqually River -> Puget Sound -> Salish Sea -> Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Alder Lake is a 7 mi (11 km) long reservoir on the Nisqually River about ten miles south of Eatonville, Washington, It was created by the construction of Alder Dam by Tacoma Power in September 1944. At the very eastern end of the lake is the town of Elbe, Washington.