Lake Pontchartrain

Lake Pontchartrain is a large coastal lagoon-like lake in southeastern Louisiana, north of New Orleans, and connected to the Gulf of Mexico by several passes. It is a prominent regional water body used for transport, recreation and local fisheries.

Recreational activities include boating, fishing and shoreline parks; the lake’s shallow waters and extensive marshes support local fisheries and birdlife. The Lake Pontchartrain Causeway is a prominent engineered crossing that carries vehicle traffic across the lake and is a notable landmark in its own right.

Several state parks and waterfront communities along the lake provide access points, boat launches and picnic areas, though conditions vary with tides, storms and seasonal factors. The lake is also affected by coastal processes and storm surge from Gulf hurricanes.

Named during the French colonial era, the lake has long been a focus for settlement and transport in southeastern Louisiana; infrastructure such as the Causeway was constructed in the mid-20th century to improve cross-lake travel. The lake and its shorelands have been shaped by land-use change, navigation and coastal management efforts.

The lake lies immediately north of New Orleans and Orleans Parish, stretching east-west and bounded by multiple parishes and coastal wetlands; it connects to the Gulf via the Rigolets and Chef Menteur passes. The Causeway links suburbs on the lake’s south shore with communities on the north shore.

• Recreation note: Freshwater-to-brackish conditions and shallow depths make the lake popular for fishing and recreational boating; expect busy activity in summer.

What to See#

• Lake Pontchartrain Causeway: A pair of parallel road bridges forming one of the world’s longest over-water spans, linking the southshore suburbs of New Orleans with communities north of the lake over a distance of about 38 kilometres.

Lake Pontchartrain lies north of New Orleans, Louisiana. A principal crossing is the Lake Pontchartrain Causeway (US‑190), which connects the New Orleans metropolitan area (Metairie/Mandeville) across the lake. From downtown New Orleans take I‑10/I‑610 toward the lake and follow signs for US‑190 (Causeway) to reach north‑shore towns; there are also numerous park-and-view spots and boat ramps on both the south and north shores.

• For sweeping views, cross the Lake Pontchartrain Causeway by car at sunrise or sunset-light is best then and traffic is lighter than commuter times; the bridge itself is a drive-only structure, not suitable for pedestrians.
• Avoid peak weekday commute hours if you're driving the Causeway-the bridge sees heavy traffic to and from New Orleans suburbs during mornings and late afternoons.
• Don't limit yourself to the bridge: visit New Orleans's lakefront parks and West End for accessible shoreline viewpoints and seafood restaurants that most Causeway viewers miss.
• If you're planning outdoor activities on the lake's shores, check weather and marine advisories-storms and strong winds can develop quickly over the lake and affect small boats and fishing.