Nestled along the shores of Ohio's largest inland lake, Grand Lake Camp Sites 1-120 welcome families to a full-service camping experience where waterfront adventures meet modern convenience. With 120 sites ranging from full-hookup to rustic non-electric options, plus cozy cabins, this campground pairs essential amenities like a refreshing pool, splash pad, and mini-golf with the natural draw of direct lake access and your own boat slip.
Offers Full Hookup, Electric, and Non-electric sites plus camper and cedar cabins. Designated non-electric sites are for tent camping.
Historical Significance
Grand Lake St. Marys was originally constructed as a feeder reservoir for the Miami-Erie Canal and for many years was recognized as one of the largest man-made reservoirs in the world. The park and surrounding properties reference the region's canal-era history.Weather and SeasonsSummer is peak season for a reason. Daytime highs run mid-70s to low-90s °F (24–33 °C), water temperatures stay comfortable for swimming, and the pool operates with lifeguards and long hours. Expect crowds at the pool in July, mosquitoes, ticks, and occasional afternoon storms. Fall draws repeat visitors for quieter weekends, cooler temps, and the same lake access without the splash-pad chaos. The campground stays open year-round, with spring (April–May) and fall (September–October) offering a middle ground between summer bustle and winter closures of some amenities.
Natural Features and SceneryGrand Lake St. Marys stretches before you like a shimmering playground, inviting morning fishing trips and sunset pontoon cruises. Registered campers enjoy exclusive access to boat launches and personal tie-ups, while paved pathways wind through the campground, connecting you to sandy swimming beaches and scenic lakeside vistas. The expansive water views create an ever-changing backdrop—watch sunrise mist lift off the water from your campsite, then spend your afternoon casting a line or launching your kayak into the calm, welcoming waters.