Lake Ranch, also known as Lake Ranch Reservoir, is a significant water supply reservoir located in Saratoga, California. Owned and regulated by a public utility, this earth dam structure was completed in 1877 and stands at a height of 38 feet with a hydraulic height of 26.9 feet. The reservoir has a storage capacity of 215 acre-feet and covers an area of 18 acres, drawing water from Beardsley Creek.

Maintained by the California Department of Water Resources, Lake Ranch serves as a crucial water resource for the region, supporting various water supply purposes. Despite its fair condition assessment, the dam is classified as having significant hazard potential, highlighting the importance of regular inspections and maintenance. The last inspection in September 2020 revealed no immediate concerns, but the dam remains under close monitoring to ensure its safety and functionality in the face of changing climate conditions.

With its historical significance dating back over a century, Lake Ranch Reservoir stands as a testament to California's ongoing efforts to manage and regulate its water resources effectively. The presence of state permitting, inspection, and enforcement mechanisms ensures that the dam continues to provide essential water supply services while mitigating potential risks associated with its operation. As climate change poses new challenges to water resource management, Lake Ranch remains a vital asset in securing reliable water access for the community it serves.