Dumfoundling Bay is a wide spot on the Intracoastal Waterway in northern Miami-Dade County, Florida. It is a saltwater bay bordered to the east by the Intracoastal Waterway, with the Atlantic Ocean accessible to the south via the Haulover Inlet. The bay's location places it within a network of developed shorelines, canals, and islands, with mangrove shorelines historically present. For paddlers, a key access point is Turnberry Marina, which is located between Biscayne Bay and Dumfoundling Bay and serves as a well-appointed marina, though it is primarily for private vessels and docking. The broader area, including nearby Aventura, offers opportunities for kayaking and paddleboarding in tranquil waters. The bay is part of the Biscayne Bay Aquatic Preserves system, and management plans identify and support appropriate locations for paddling launches. A significant safety consideration is the presence of boat traffic, as the bay is directly on the Intracoastal Waterway, a major navigation channel. Paddlers should also be aware of the Haulover Inlet to the south, which is a busy passage to the Atlantic Ocean and can involve strong currents and wave action. The area is historically a travel corridor for manatees, so paddlers may encounter this protected wildlife. The overall character is that of an urban coastal waterway, with proximity to the hustle and bustle of Miami yet offering pockets of natural exploration.