Lake Manassas is a large reservoir located in Prince William County, Virginia. It was created in the 1980s by damming the Bull Run River and serves as a water supply for the surrounding areas. The lake covers approximately 1,200 acres and has a maximum depth of around 40 feet. The lake is popular for various recreational activities, including fishing, boating, and picnicking. It is home to several species of fish, such as bass and catfish, making it a favored spot for anglers. Additionally, the surrounding parkland offers trails and scenic views for visitors to enjoy.