Joiner Bank is a designated Seabird Sanctuary and Heritage Preserve located in the coastal waters of South Carolina, USA. It is a dynamic sand spit, formed by river deposits, that shifts in position and structure due to erosion and deposition. This feature is a tidal bar that is completely underwater at high tide, becoming accessible as a sandbar only during lower tidal periods. For paddlers, this means trip timing is critically dependent on the tide; the bank is only exposed for landing or observation when the tide is out. The area is legally accessible only from one hour before sunrise to one hour after sunset. As a protected seabird sanctuary, specific regulations are strictly enforced: no dogs are allowed, and no person may enter any area designated as a bird nesting area. The sanctuary does not currently support nesting due to its low elevation but remains an important rest and foraging area for birds.

The paddling experience here is defined by open, tidal waters with significant exposure to wind and weather. Paddlers must plan launches and take-outs from other points along the South Carolina Saltwater Paddling Trail, such as those accessing the Wright River or New River, as Joiner Bank itself is not a launch site. Navigating to the bank requires crossing open water of St. Helena Sound, where boat traffic and fetch can create challenging conditions. The key consideration is aligning the trip with the falling tide to arrive when the bank is exposed, and ensuring a return before access closes at sunset. The surrounding region is rich in natural and cultural sites accessible by kayak, including the Daws Island Heritage Preserve, Hunting Island State Park, and the historic sites on Parris Island. The overall character is one of a remote, protected marine environment where paddlers are visitors in a sensitive wildlife habitat, requiring careful planning around tides, weather, and regulations.