Laguna de Manantial (Spring Lake) was a lake or semi-freshwater lagoon in the Mission District before the mid-1800s. It stretched from 15th Street to 19th Street, and from Guerrero Street to Howard Street.

After the Mexican-American War, its remnants became known as Lake McCoppin.

According to recent studies and research, Laguna de Manantial (also known as Laguna de los Dolores) was more likely a brackish tidal zone of Mission Creek, as opposed to a freshwater lake.