Lake Del Valle
General data
- Name: Lake Del Valle
- Water system: Pacific Ocean
- Water type: Artificial lake
- Progression: Arroyo Valle -> Arroyo de la Laguna -> Alameda Creek -> San Francisco Bay -> Golden Gate strait -> Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Lake Del Valle is a storage reservoir located 10 miles (16 km) southeast of Livermore, in Alameda County, California. It is within Del Valle Regional Park.
The lake is on Arroyo Valle (Spanish for "creek of the valley") in the Diablo Range, and is formed by Del Valle Dam, completed in 1968.