2020 Map of Cat Island Pass

About this map

Terrebonne Bay meets the open waters of the Gulf of Mexico in this coastal survey of Louisiana’s southern reaches. The landscape is defined by the fragile barrier system of Timbalier Island and Wine Island, which serve as the primary buffer between the inland marshes and the gulf. These landforms shape Cat Island Pass, a critical waterway for navigation into the protected bay. The map illustrates the sparse, water-dominant environment of the 21st century, where tidal movement and shifting sands are the primary architects of the terrain. This document is essential for understanding the modern shoreline configuration and the relationship between the barrier islands and the expansive estuarine system of the parish.