This lake was created by the construction of a dam on Little Seneca Creek and is located near the Boyds community in Black Hill Regional Park. It was built to provide an emergency water supply for the metropolitan Washington, D.C. area and it also provides a recreational amenity for the public. Fishing and boating facilities, including two boat ramps are available to the public. About half of the shoreline is developed with homes, especially on the east side, but the rest is beautiful with thick forest and rolling hills surrounding it. The lake is small but long and narrow with three different branches, each hosting coves and inlets for exploring and viewing wildlife.