Card Sound is a coastal saltwater sound located just east of Key Largo in the Florida Keys. It is characterized by extensive mangrove shorelines and interconnected tidal creeks, offering a sheltered, winding paddling environment away from open ocean conditions. The sound is a designated segment of the Florida Circumnavigational Saltwater Paddling Trail, indicating its established use for kayaking and canoeing. Primary public launch sites for paddlers are concentrated along Card Sound Road. The Card Sound Bridge, East ramp is a 24-hour access point with parking, suitable for small boats, kayaks, and canoes, though the ramp surface is unpaved and was reported as being in fair condition. Other potential launch points referenced in the area include sites at Mosquito Creek, Steamboat Creek, and Tubby's Creek, but several specific canoe/kayak access sites, such as the Mosquito Creek site and the Steamboat Creek site, have been reported as permanently closed to public use. Paddlers must verify current public access status before planning a trip. The paddling experience involves navigating through mangrove tunnels and creeks, such as Saunders Creek and Tubby's Creek, with one documented route covering 6.6 miles and rated for intermediate skill levels. A key safety consideration for paddlers is the presence of boat traffic, particularly near the Card Sound Bridge and where creeks meet the main sound, requiring careful navigation. The area is part of the Crocodile Lake National Wildlife Refuge, which underscores the presence of significant wildlife and natural habitats. The water is marine and tidal, so paddlers must plan for tidal currents. The aesthetic is defined by dense, overhanging mangroves creating narrow passages, with open water views in the broader sound.