More lake days on Lake Marion 😊 Hard not to love this wonderful place! Lake Marion is pure South Carolina magic right here in the heart of Santee Cooper Country. This 110,000-acre man-made lake is a go-to spot for fishing, boating, and soaking up the outdoors. Known for its impressive catfish and striped bass, it is a favorite for anglers and lake lovers alike. Take a swim at Santee State Park, explore the peaceful beauty of Sparkleberry Swamp, or head to the nearby Santee National Wildlife Ref