Caddo Lake

Caddo Lake is a natural freshwater lake and wetland on the Texas–Louisiana border in the United States.

Caddo Lake is a natural freshwater lake and wetland straddling the Texas–Louisiana border in the United States. Known for its extensive cypress swamps and bayous, the lake is recognized as a Ramsar wetland of international importance. Its formation is commonly linked to the Red River Great Raft logjam, and its present state has been altered by dam construction. The location of this lake can be seen on a World map.

Geography

Caddo Lake lies on the border of Texas and Louisiana and covers roughly 25,400 acres, though reported totals vary by water level and source. It is a shallow lake with an intricate system of bayous, sloughs, and swamp channels. It is widely described as Texas’s largest natural lake and one of the few natural lakes in the state. The lake's position on the Texas–Louisiana border is visible on a World map.

Formation and hydrology

The lake formed naturally, with scientific and historical accounts commonly linking its origin to the Great Raft on the Red River. Some sources also cite the 1811–1812 New Madrid earthquake as a contributing factor. Its modern water level and outflow were later stabilized by dam and spillway construction, which altered but did not create the lake.

Ecology

Caddo Lake is noted for its flooded bald cypress forest, wetland habitat, and high biodiversity. The area supports fish, amphibians, reptiles, waterfowl, and migratory birds, making it important for wildlife conservation. The lake and surrounding wetlands are internationally protected under the Ramsar Convention.

Recreation and protected areas

The lake is used for boating, fishing, wildlife viewing, and paddling, and it is associated with Caddo Lake State Park and the Caddo Lake National Wildlife Refuge. Its protected status reflects both recreational value and ecological significance.