Grand Lake St. Marys, located in Mercer County, Ohio, is a historic and expansive body of water renowned as a premier destination for recreation. At 13,500 acres, it holds the distinction of being the largest inland lake entirely within Ohio's borders. Originally constructed in the 1840s as a feeder for the Miami-Erie Canal, the lake's long history is a testament to its enduring importance. Today, its shallow waters, with a maximum depth of 16 feet, provide a fantastic environment for a diverse fishery that includes saugeye, crappie, bluegill, and largemouth bass. The lack of horsepower limits makes it a popular spot for powerboating, jet skiing, and water sports, drawing enthusiasts from all over the region to its shores.
As the focal point of Grand Lake St. Marys State Park, the lake offers a wide array of activities and attractions for all visitors. The park boasts four public swimming beaches, numerous campgrounds, and a wide network of hiking and biking trails. The towns of Celina and St. Marys provide a charming backdrop, with local dining and amenities that cater to lakeside visitors. The lake's unique history is also a draw, and a visit to the nearby Neil Armstrong Air and Space Museum in Wapakoneta adds an exciting cultural dimension to any trip. From fishing tournaments and bird watching to boating and camping, Grand Lake St. Marys is a vibrant destination with something for everyone.
