Head to Chippewa County, Wisconsin for this year's swim across Lower Long Lake, a stunning 1,089-acre body of water formed by ancient glaciers and featuring depths up to 101 feet. This scenic lake, surrounded by preserved woodlands and wetlands, has hosted 29 previous open water swim events each July, and you'll find camping available at the park with a 3-night minimum stay ($20/night for basic sites, plus $7/night for electricity if desired).