what town is grand lake st mary near
Grand Lake St. Marys State Park. Grand Lake St. Marys State Park is an American state park, west of St. Marys, and south-east of Celina, 23 miles (37 km) south-west of Lima in the north-western part of Ohio. Grand Lake covers 13,500 acres (5,500 ha) in Mercer and Auglaize counties.