Diamond Valley Lake, located in Winchester, California, is a stunning reservoir primarily used for water supply but also offering recreational opportunities. Completed in 2000, this earth dam stands at an impressive height of 284 feet and has a storage capacity of 800,000 acre-feet. With a surface area of 4860 acres, the lake provides a vital resource for the surrounding area while also serving as a recreational destination for visitors.

Managed by a public utility, Diamond Valley Lake is regulated by the California Department of Water Resources (DWR) for safety and inspection. The dam has a high hazard potential but is currently rated as satisfactory in condition, with the last assessment conducted in September 2017. The reservoir is situated on the Domenigoni Valley Creek and is under the jurisdiction of the state of California, ensuring that it meets all necessary permitting, inspection, and enforcement requirements to maintain its operations.

Visitors to Diamond Valley Lake can enjoy various water-based activities and nature experiences within its picturesque setting. With its strategic location in Riverside County and close proximity to the city of Winchester, the reservoir serves as a vital water source for the region while offering a tranquil escape for water resource and climate enthusiasts alike.