Grand Lake St Marys State Park

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Last Updated: December 5, 2025

Grand Lake St Marys State Park is a beautiful recreational area located in the state of Ohio.


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Summary

It covers 13,500 acres and features a 13,500-acre lake with numerous opportunities for boating, fishing, and water sports.

The park is an excellent place to visit for those who love the outdoors and appreciate the natural beauty of Ohio. It is known for its diverse wildlife and excellent fishing opportunities, including catfish, bass, and bluegill. The lake is also home to numerous species of waterfowl, including ducks, geese, and swans, making it a popular spot for birdwatchers.

One of the most popular attractions at the park is the Neil Armstrong Air and Space Museum, which celebrates the life and achievements of the famous astronaut. Visitors can learn about Armstrong's life and career and explore interactive exhibits related to space exploration.

Other notable attractions at Grand Lake St Marys State Park include the 33-acre Prairie Habitat Restoration Area, which provides habitat for native wildlife, and the 4.5-mile Indian Lake State Park Trail, which offers a scenic hike through the park.

The best time to visit Grand Lake St Marys State Park depends on your interests. Summer is the most popular time to visit, as the weather is warm and there are numerous opportunities for swimming and boating. However, fall is also a beautiful time to visit, with the changing leaves providing a stunning backdrop for hiking and wildlife viewing.

Overall, Grand Lake St Marys State Park is a beautiful and diverse recreational area that offers something for everyone. Whether you're an avid angler, a nature lover, or a fan of space exploration, this park is definitely worth a visit.

       

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Park & Land Designation Reference

National Park
Large protected natural areas managed by the federal government to preserve significant landscapes, ecosystems, and cultural resources; recreation is allowed but conservation is the priority.
State Park
Public natural or recreational areas managed by a state government, typically smaller than national parks and focused on regional natural features, recreation, and education.
Local Park
Community-level parks managed by cities or counties, emphasizing recreation, playgrounds, sports, and green space close to populated areas.
Wilderness Area
The highest level of land protection in the U.S.; designated areas where nature is left essentially untouched, with no roads, structures, or motorized access permitted.
National Recreation Area
Areas set aside primarily for outdoor recreation (boating, hiking, fishing), often around reservoirs, rivers, or scenic landscapes; may allow more development.
National Conservation Area (BLM)
BLM-managed areas with special ecological, cultural, or scientific value; more protection than typical BLM land but less strict than Wilderness Areas.
State Forest
State-managed forests focused on habitat, watershed, recreation, and sustainable timber harvest.
National Forest
Federally managed lands focused on multiple use—recreation, wildlife habitat, watershed protection, and resource extraction (like timber)—unlike the stricter protections of national parks.
Wilderness
A protected area set aside to conserve specific resources—such as wildlife, habitats, or scientific features—with regulations varying widely depending on the managing agency and purpose.
Bureau of Land Management (BLM) Land
Vast federal lands managed for mixed use—recreation, grazing, mining, conservation—with fewer restrictions than national parks or forests.
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