Lake Pontchartrain has a mean depth of 10 to 16 feet, according to the Encyclopaedia Brittanica. Located in southeastern Louisiana, the lake is 40 miles long and has a maximum width of 25 miles. It covers an area of 630 square miles.
Lake Pontchartrain is not a true lake; it is actually an estuary or a tidal lagoon that is connected to the Gulf of Mexico through a narrow waterway, called The Rigolets, and Lake Borgne. Its waters are brackish, and it is home to abundant fish and aquatic birds. New Orleans is situated on the lake's eastern and southern shores.