Construction of Vallecito Dam began on May 14, 1938, and was completed in 1941. Vallecito Dam is a earthfill structure that is 162-foot-high and contains 3,738,000 cubic yards of material. The reservoir has a total capacity of 129,700 acre-feet.

Why is Vallecito Reservoir so low?

Drought conditions are to blame for low water level at Vallecito Reservoir. The lake is 40 percent full, down about 32 feet from full capacity. Drought conditions are to blame for low water level at Vallecito Reservoir. The lake is 40 percent full, down about 32 feet from full capacity.

Can you swim in Vallecito Lake?

Vallecito Lake offers a free public swimming area, with many fee-based swimming areas surrounding it as well. Water activities such as boating, paddle boarding, and fishing, are a great way to enjoy your visit.