Barreirinhas is a municipality located in the state of Maranhão, situated within the Northeast region of Brazil. It serves as a primary gateway to some of the country's most significant natural landscapes.
The city is primarily recognized for its proximity to and role in providing access to the Lençóis Maranhenses National Park. This protected area is famous for its vast white sand dunes and seasonal lagoons, making Barreirinhas a key destination for regional tourism and exploration.