Mazo Beach is the colloquial name for Mazomanie Bottoms State Natural Area, located in Sauk County in the U.S. state of Wisconsin. Property along the river was acquired in parcels by the State of Wisconsin since the 1950s to provide a full range of nature based activities including hiking, wildlife viewing, hunting, fishing, and wildlife habitat. Since 1978, the beach and surrounding nature preserve have attracted picnickers and swimming day-trippers to its open and expansive shoreline.