Lake Manassas is a 770-acre reservoir located in Prince William County, Virginia, to the southwest of Gainesville. The reservoir was created in the late 1960s to provide drinking water for area residents. Today it contributes to a regional water system which serves the cities of Manassas and Manassas Park, and unincorporated areas of Prince William County.
Although it is located outside the city limits, Lake Manassas is owned and operated by the city of Manassas, Virginia. Several golf clubs have courses along the banks, including Stonewall Golf Club, Robert Trent Jones Golf Club and Virginia Oaks Golf Club.
