Relocating to Lake Hartwell: A Complete Guide to the Six Counties that Border Lake Hartwell. If you are considering owning on Lake Hartwell, here is a quick guide you may find useful. Since I was an infant, my family has been enjoying Lake Hartwell. They invested in a lakefront lot, and my parents and siblings have enjoyed everything Hartwell has to offer. From campfires on the shoreline to boating and water skiing it has been a family legacy I have shared with my loved ones