Lake Cataouatche is a 9,280-acre freshwater lake located southwest of New Orleans in St. Charles and Jefferson Parishes, Louisiana. Connected to Lake Salvador to the south by Bayou Couba and Bayou Bardeaux, this shallow lake has an average depth of 6 feet. The lake's ecosystem has been significantly impacted by the opening of a diversion canal allowing Mississippi River water to flow in, increasing nutrients and turbidity while altering salinity levels.

Boating, kayaking, and canoeing are permitted on Lake Cataouatche. Bayou Segnette State Park offers boat access to the lake, along with camping and other recreational facilities. The lake is renowned for its fishing, particularly for largemouth bass, catfish, crappie, and bluegill. In 2011, it gained prominence when Kevin VanDam caught nearly 29 pounds of bass here during the Bassmaster Classic tournament.

Lake Cataouatche's ecosystem is characterized by submerged aquatic vegetation, which provides cover for fish but has also been the subject of controversy. At one point, invasive hydrilla covered 98% of the lake, creating excellent bass habitat but posing challenges for boating. Efforts to control the vegetation have met with mixed reactions from anglers and conservationists.

The lake's water quality and clarity have been affected by the Mississippi River diversion, with increased turbidity potentially impacting aquatic plant growth. Paddlers should be aware that water conditions can vary significantly based on river inflows and seasonal patterns.

Wildlife enthusiasts may spot a variety of wading birds and waterfowl around the lake. The surrounding area includes protected wetlands and swamps, offering opportunities to observe native flora and fauna.

When planning a paddling trip on Lake Cataouatche, be prepared for potentially muddy waters and changing vegetation patterns. The lake's proximity to New Orleans (about 14 miles southwest) makes it an accessible destination for urban paddlers seeking a taste of Louisiana's diverse aquatic ecosystems.