Lake Hartwell Real Estate View 322 listings HomeGuidesLake Hartwell Lake Hartwell is one of the largest and most popular recreational lakes in the Southeast region. With 962 miles of shoreline and 80 public boat launches, Lake Hartwell offers visitors and residents with some great summer memories! Guides Oconee CountyAnderson CountyPickens CountyLake KeoweeLake HartwellLakefrontSenecaClemsonAndersonThe Cliffs & Reserve CommunitiesLots & LandCondos & Townhomes