The Big Boggy National Wildlife Refuge is a wildlife conservation area along the coast of Texas (USA) in southeastern Matagorda County, south of the towns of Bay City and Wadsworth. It borders a bay behind a barrier island at the Gulf of Mexico. Established in 1983 and encompassing 5000 acre of salt marsh. Big Boggy National Wildlife Refuge is for the birds. The refuge is only open to the public for waterfowl hunting season and for special activities. Three national wildlife refuges on the Texas coast - Brazoria, San Bernard and Big Boggy - form a vital complex of coastal wetlands harboring more than 300 bird species.