Lake Jennings is a reservoir located in San Diego County, California. It covers approximately 100 acres and is primarily used for recreational activities such as fishing, hiking, and picnicking. The lake is stocked with various fish species, making it a popular spot for anglers. The surrounding area features a campground and several trails, providing opportunities for outdoor enthusiasts to explore the natural beauty of the region. Lake Jennings is also part of the San Diego County Water Authority system, contributing to the local water supply while offering a serene environment for visitors.