Well-developed marina with multiple piers full of boats, adjacent striped surface parking lot with several vehicles, surrounded by residential area and a large white-roofed building likely a service facility.
Mariner Cay Marina is located in Stuart, Martin County, Florida, along the St. Lucie River, which flows into the Atlantic Ocean on Florida's east coast, rather than the Gulf Coast. This setting in the Treasure Coast region offers access to the Intracoastal Waterway and nearby coastal waters, making it ideal for recreational boating and sailing in protected inland waterways as well as opportunities for ocean excursions. It caters to boaters interested in exploring the scenic rivers, inlets, and Atlantic coastal areas of southeastern Florida.
Marinas typically need to separate slip holder parking from day-visitor parking, trailer areas, launch ramps, and secure dock access points. Modern facilities use barrier gate systems to enforce these zones automatically — allowing permitted vehicles through via transponder or keycard while logging all access events.
