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2015 Map of Fourleague Bay

Name: 2015 Topographic Map of Fourleague Bay
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

Point Au Fer Island dominates this coastal landscape where the waters of the Gulf of Mexico meet the intricate marshlands of Louisiana. This environment is defined by a dense network of tidal waterways, including Big Carencro Bayou and the winding Wildcat Bayou. The map illustrates a transitional zone where large water bodies like Fourleague Bay and Mosquito Bay are separated by narrow points and islands such as Mosquito Island and South Point.

Located along the boundary of St. Mary Parish and Terrebonne Parish, the area shows a distinct absence of permanent human settlements, reflecting its role as a wild coastal marsh. Navigational features like Mosquito Pass and Little Mosquito Pass provide critical passage through the wetlands, while interior features such as Lake Chapeau highlight the fragmented nature of the deltaic plain before it reaches the open sea.