Calcasieu Lake is a large coastal lake located in Louisiana, near the city of Lake Charles. It covers approximately 30,000 acres and is part of the Calcasieu River estuary system. The lake is known for its diverse ecosystem, which includes various fish species and bird habitats, making it a popular spot for fishing and birdwatching. The lake is connected to the Gulf of Mexico through the Calcasieu Ship Channel, allowing for commercial shipping and recreational boating. Its surrounding wetlands play a crucial role in flood control and water quality, contributing to the overall health of the region's environment.