Richmond Lake is a 823-acre impoundment located approximately 5 miles north and 4 miles west of Aberdeen in Brown County, South Dakota. With a maximum depth of 23 feet and a mean depth of 8 feet, this prairie lake serves as a popular fishing destination for anglers in northeastern South Dakota. The lake is part of the Moccasin Creek watershed and is surrounded by primarily agricultural land with numerous homes and cabins along the shoreline. Richmond Lake offers year-round fishing opportunities in a scenic setting, with three public access areas maintained by the South Dakota Game, Fish and Parks Department. The lake features a diverse fish population, moderate water clarity, and has occasionally been impacted by algal blooms during summer months.