Charleston Lake is located in South Eastern Ontario, just north east of Gananoque. The lake is carved out of the Frontenac Axis, a relatively narrow extension of the Canadian Shield bedrock which dominates the landscape of Northern Ontario. The lake is the principal watershed for the Gananoque River, and boasts prime fishing locations. Charleston La…Charleston Lake is located in South Eastern Ontario, just north east of Gananoque. The lake is carved out of the Frontenac Axis, a relatively narrow extension of the Canadian Shield bedrock which dominates the landscape of Northern Ontario. The lake is the principal watershed for the Gananoque River, and boasts prime fishing locations. Charleston Lake Provincial Park is located on the shores of the lake, and offers camping, hiking, boating, fishing and interpretive sessions.