The Chandeleur Islands (French: Îles Chandeleur) are a chain of uninhabited barrier islands approximately 50 miles (80 km) long, located in the Gulf of Mexico, marking the outer boundary of the Chandeleur Sound. They form the easternmost point of the state of Louisiana, United States and are a part of the Breton National Wildlife Refuge. They are an important migrating point for many birds on their way south, and are a prime marsh and forest wildlife area.