The Laguna Madre is a long, shallow, hypersaline lagoon along the western coast of the Gulf of Mexico in  Nueces, Kenedy, Kleberg, Willacy and Cameron Counties in Texas, United States. It is separated by the roughly long Saltillo Flats land bridge into Upper and Lower lagoons. The two are joined by the Intracoastal Waterway, which has been dredged through the lagoon. Cumulatively, Laguna Madre is approximately 130 miles (209 km) long, the length of Padre Island. The main extensions include Baffin Bay in Upper Laguna Madre, Red Fish Bay just below the Saltillo Flats, and South Bay near the Mexican border.