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Grand Lake St. Marys State Park adventures

Grand Lake St. Marys State Park Adventures

Grand Lake St. Marys State Park, centered around one of Ohio’s largest inland lakes, offers diverse outdoor recreation including boating, fishing, hiking, and camping in a scenic combination of water and woodland habitats.

5,250
Acres Protected
30+
Miles of Trails
250,000+
Annual Visitors
1949
Year Established

About Grand Lake St. Marys State Park

 

Grand Lake St. Marys State Park is located in western Ohio and envelops Grand Lake St. Marys, a 13,500-acre artificial reservoir originally constructed in the 19th century as a feeder for the Miami and Erie Canal. The park covers over 5,000 acres, featuring extensive shoreline, wetlands, and wooded areas. It provides vital habitat for waterfowl, fish species, and other wildlife amidst its mixed oak, maple, and sycamore forests. Visitors come to enjoy fishing for bass, bluegill, and catfish, as well as boating, kayaking, and paddleboarding on the lake's calm waters. The park includes more than 30 miles of trails serving hikers, mountain bikers, and equestrians. Its campgrounds offer both modern amenities and rustic settings, making it a favored destination for families and outdoor enthusiasts alike. Historically, the reservoir was engineered in the 1820s and remains a prominent landmark reflecting Ohio’s canal era. During warmer months, the park hosts popular events such as birdwatching tours and fishing tournaments. The mix of aquatic and terrestrial environments provides varied wildlife viewing opportunities, especially during migratory seasons. Overall, Grand Lake St. Marys State Park presents a well-rounded outdoor experience that combines water-based fun with woodland exploration, ideal for visitors seeking both active recreation and tranquil natural settings.

Highlights

Highlight

Grand Lake St. Marys Reservoir – one of Ohio’s largest man-made lakes perfect for boating and fishing

Highlight

Extensive trail system with over 30 miles for hiking, biking, and equestrian use

Highlight

Robinson Bay – a popular spot for waterfowl viewing and water activities

Highlight

Historic canal remnants and interpretive markers detailing the area’s 19th-century engineering heritage

Notable Natural Features

Grand Lake St. Marys Reservoir

Spanning 13,500 acres, this large freshwater lake offers prime boating, fishing, and water recreation opportunities.

Robinson Bay

A sheltered bay area known for excellent birdwatching, fishing, and calm water paddling.

Trail Network

Over 30 miles of multi-use trails weaving through forested terrain and along the lake’s shoreline.