San Antonio Reservoir, body of water
San Antonio Reservoir is a large water storage area in Alameda County, situated roughly three miles east of Sunol. The water body spans about 825 acres and is contained by the James H. Turner Dam, which collects water from the Hetch Hetchy Aqueduct, local wells, and surrounding watersheds.
The James H. Turner Dam was built in 1964 to store water for the region and ensure water security. Since its construction, the facility has supported the water supply for local cities and agricultural areas.
The reservoir serves as a water source for nearby communities and represents how the region manages its natural resources. Visitors can observe the connection between this landscape and the daily needs of the cities that depend on it.
Public access to the water is restricted, so visitors should view and photograph from outside the property boundaries. Early morning or sunset hours offer the best light for photography and viewing the water.
Water arrives partly through the distant Hetch Hetchy Aqueduct, which transports water from areas more than 125 miles away. This connection shows how California moves water across vast distances to meet the needs of its population.
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