Barreirinhas is a municipality in the state of Maranhão in the Northeast region of Brazil.
The municipality contains part of the Upaon-Açu/Miritiba/Alto Preguiças Environmental Protection Area, created in 1992.
Barreirinhas is the starting point for most trips to the Lençóis Maranhenses National Park.
Transport The locality is served by the Barreirinhas Airport.
See also List of municipalities in Maranhão
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