Druid Lake is a kettle lake located in the town of Erin, Wisconsin, Washington County, Wisconsinlocated near Hartford, Wisconsin. Druid Lake is a natural glacial-formed lake. Druid Lake is surrounded by rugged mixed woods and glacial drumlins in the Southern Savannah Region of southeastern Wisconsins Kettle Moraine area about 25 miles northwest of Milwaukee The lake has a maximum depth of 53 feet (16 m).