Floris Hardaway

Floris Hardaway

Published: 09 Sep 2023

Source: Cntraveler.com

Lake Pontchartrain, located in southeastern Louisiana, is a mesmerizing body of water that has captivated locals and visitors alike for centuries. Spanning an impressive 630 square miles, it is the largest inland saltwater lake in the United States. Beyond its sheer size, Lake Pontchartrain is steeped in history, boasting a rich cultural and ecological significance. From its unique ecosystem to its role in shaping the city of New Orleans, this stunning lake has plenty of intriguing facts waiting to be explored. So, grab your virtual snorkel and dive into the depths of Lake Pontchartrain as we uncover 15 fascinating details about this natural wonder.

Table of Contents

The largest inland body of water in Louisiana

Lake Pontchartrain is the largest inland body of water in the state. Its expansive size covers approximately 630 square miles, offering plenty of space for activities such as boating, fishing, and even seaplane landings.

Shallow depths

Despite its vast expanse, Lake Pontchartrain is relatively shallow, with an average depth of about 12-14 feet. The deepest point in the lake reaches up to 80 feet deep near the Rigolets Pass.

Salinity levels

One interesting characteristic of Lake Pontchartrain is its varying salinity levels. The western portion of the lake has a higher salinity due to its connection to the Gulf of Mexico, while the eastern part tends to be more freshwater-dominated.

The Causeway Bridge

The Lake Pontchartrain Causeway Bridge, often referred to as the “World’s Longest Bridge,” stretches for 24 miles across the lake. It connects the cities of Mandeville and Metairie, providing a scenic and convenient route for commuters.

The Maurepas Swamp

Near the northern shores of Lake Pontchartrain lies the Maurepas Swamp, one of the largest swamplands in the United States. This unique ecosystem is home to a diverse array of plants, wildlife, and migratory birds.

Hurricanes and storm surges

Lake Pontchartrain has been prone to the effects of hurricanes and storm surges throughout history. Notably, it played a significant role during Hurricane Katrina in 2005, causing devastating flooding in nearby areas.

The Lake Pontchartrain Basin Foundation

The Lake Pontchartrain Basin Foundation is a non-profit organization dedicated to preserving and restoring the lake’s ecosystem. They actively work towards maintaining water quality, promoting sustainable practices, and educating the public about the lake’s importance.

Rich history

Lake Pontchartrain has a rich history dating back centuries. Native American tribes, including the Houma and Choctaw, relied on the lake as a vital resource for fishing and transportation. European explorers also utilized its waters in their expeditions.

The Old Spanish Fort

Near the eastern shores of Lake Pontchartrain stands the Old Spanish Fort, a historic military fortification built in the late 1700s. It played a role in various conflicts throughout its existence and now serves as a popular tourist attraction.

The Lake Pontchartrain Basin Maritime Museum

Situated in Madisonville, Louisiana, the Lake Pontchartrain Basin Maritime Museum offers visitors an in-depth exploration of the lake’s maritime heritage. Exhibits showcase the history of fishing, boatbuilding, and other aspects of the lake’s cultural significance.

The Bonnet Carré Spillway

The Bonnet Carré Spillway, located on the northeastern edge of Lake Pontchartrain, serves as a flood control structure. When the Mississippi River water levels rise, the spillway diverts excess water into the lake, preventing flooding downstream.

The Northshore

The northern shores of Lake Pontchartrain, commonly referred to as the Northshore, offer a charming and tranquil escape from the bustling city life of New Orleans. The area is known for its picturesque communities, scenic byways, and outdoor recreational opportunities.

Iconic seafood

Lake Pontchartrain is renowned for its bounty of seafood, including blue crabs, oysters, and various fish species. These delicacies are a staple of the region’s cuisine, attracting both locals and tourists with their delicious flavors.

The Lake Pontchartrain Basin Foundation’s annual Beach Sweep

As part of their conservation efforts, the Lake Pontchartrain Basin Foundation organizes an annual Beach Sweep event. Volunteers gather to clean up the lake’s shoreline, removing debris and promoting a cleaner environment for both wildlife and visitors.

Sunset views

One of the most breathtaking sights at Lake Pontchartrain is the sunset. As the sun sinks below the horizon, the lake’s tranquil waters reflect hues of orange, pink, and purple, creating a picturesque setting for nature enthusiasts, photographers, and romantics alike.

These 15 intriguing facts about Lake Pontchartrain demonstrate the lake’s significance as a natural treasure and a vital part of Louisiana’s landscape. Whether you’re exploring its shores, enjoying its seafood, or simply marveling at its beauty, Lake Pontchartrain offers something truly special to locals and visitors alike.


Lake Pontchartrain is a fascinating natural wonder that captivates both locals and tourists alike. With its rich history, diverse ecosystem, and stunning beauty, it continues to be a significant landmark in Louisiana. Whether you’re interested in its unique geological characteristics, the legendary lore surrounding it, or the various recreational activities it offers, Lake Pontchartrain has something for everyone.

Exploring the lake’s mysteries and hidden gems is a truly rewarding experience. From the mesmerizing sunsets on the Causeway to the abundance of marine life, there is always something new to discover. So, venture out and immerse yourself in the wonders of Lake Pontchartrain – you won’t be disappointed!


1. How big is Lake Pontchartrain?

Lake Pontchartrain is approximately 630 square miles in size, making it one of the largest inland bodies of water in the United States.

2. Is Lake Pontchartrain a saltwater or freshwater lake?

Lake Pontchartrain is a brackish lake, meaning it is a mix of saltwater and freshwater due to its connection to the Gulf of Mexico.

3. Are there any dangerous creatures in Lake Pontchartrain?

No, Lake Pontchartrain is generally safe for swimming and recreational activities. However, it is always advisable to be cautious and aware of your surroundings.

4. Can you go fishing in Lake Pontchartrain?

Absolutely! Lake Pontchartrain is known for its excellent fishing opportunities. Anglers can expect to catch a variety of fish species, including redfish, speckled trout, and flounder.

5. Are there any islands in Lake Pontchartrain?

Yes, there are several islands in Lake Pontchartrain, including Grand Isle, located at its southern end, which is a popular destination for beachgoers and outdoor enthusiasts.

6. Can you boat on Lake Pontchartrain?

Yes, boating is a popular activity on Lake Pontchartrain. Whether you prefer sailing, kayaking, or powerboating, the lake offers ample opportunities to enjoy the water.

7. Is Lake Pontchartrain affected by hurricanes?

Yes, Lake Pontchartrain is susceptible to the impacts of hurricanes. The lake’s shallow depths and proximity to the Gulf of Mexico make it vulnerable to storm surges and flooding during severe weather events.

8. Are there any historical sites near Lake Pontchartrain?

Yes, the area surrounding Lake Pontchartrain is rich in history. Visitors can explore historical sites such as Fort Pike, which played a significant role in protecting New Orleans during the Civil War.

9. Can you swim in Lake Pontchartrain?

Yes, swimming is allowed in Lake Pontchartrain. However, it is always essential to check for water quality advisories and be mindful of any posted warnings.

10. What is the best time to visit Lake Pontchartrain?

The best time to visit Lake Pontchartrain is during the spring and fall seasons when the weather is pleasant and there are fewer crowds. However, the lake offers something unique and beautiful year-round.