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Grand Lake–Saint Marys is a public lake in Mercer County, Ohio, managed by Ohio Division of Wildlife. It is public water managed for fishing by the Ohio Division of Wildlife.
Lakes and reservoirs across this region typically hold walleye, northern pike, yellow perch, largemouth and smallmouth bass, and panfish such as bluegill, crappie and pumpkinseed, with muskellunge present in some larger lakes -- species commonly documented across the region's public waters by state wildlife agencies.
Grand Lake–Saint Marys covers about 2,229 acres in the Southwest Ohio region. The nearest other mapped waters on PiscaMaps are Grand Lake and Chickasaw Creek.
Boat ramps: 2 mapped — Boat ramp, Boat ramp.
Camping: 1 site mapped nearby — Campsite.
Source: OpenStreetMap contributors.
Anyone 16 or older needs an Ohio fishing licence — resident annual is about $25, non-resident annual about $51, and 1-day and 3-day licences are also sold. There is no separate trout stamp. Buy online or in the HuntFish OH app from the Ohio Division of Wildlife. An Ohio fishing licence covers this water; Lake Erie has its own regulation booklet and daily limits.
Every water carries species, bank & boat access, current regulations and live water conditions — and members get Swim Mapper, Catch Logger and Trip Planner. It's the only US map with a dedicated carp-water layer.
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