Grand Lake St. Marys State Park
United States
About Grand Lake St. Marys State Park
County: Mercer and Auglaize Counties. Approximately 13,500+ acres (54.63 km²) including one of the largest man-made lakes in the United States
United States
County: Mercer and Auglaize Counties. Approximately 13,500+ acres (54.63 km²) including one of the largest man-made lakes in the United States