Charleston Lake Provincial Park is located on Charleston Lake near Athens, Ontario, Canada, in the township of Leeds and the Thousand Islands. The park occupies 23.53 square kilometres (9.08 sq mi) in the Frontenac Axis region, a southern extension of the Canadian Shield. The park's forests and animal life, therefore, include species normally found further north, yet the southern climate allows species more typical for the southern latitude to co-exist with the northern species. The park includes hiking trails, swimming areas and campgrounds.