
landmark
Circuito Lagoa Azul
Four-wheel-drive trucks traverse 12 kilometers of deep sand to reach these pristine dune pools. Bring cash for park guides.
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The sand dune threshold to Maranhão’s freshwater lagoons.
introduction
Barreirinhas serves as the primary gateway to Parque Nacional dos Lençóis Maranhenses. The town sits along the Rio Preguiças, where motorboats replace buses and 4x4 vehicles handle every land journey. Expect rough roads and dusty streets in exchange for direct access to vast white dunes and rainwater pools.
Boat versus 4x4
Speedboats to Atins depart from the main Beira-Rio pier at 08:30. Overland 4x4 trucks take twice as long over unpaved sand tracks.
UNESCO status
Lençóis Maranhenses gained UNESCO World Heritage status in 2024. Only licensed tour operators may drive into the dune perimeter.
Lagoon seasonality
Rainwater fills the dunes between May and August. By November, many smaller lagoons evaporate completely.

Barreirinhas
Esquilo · CC BY-SA 3.0
Centro & Beira-Rio — Paved riverfront strip with tour agencies, craft stalls, and evening eateries.
Ridiculopathy · CC0
Boa Vista — Quiet residential bank along the river hosting resort-style pousadas.
Iain and Sarah from London, UK · CC BY 2.0
Caburé — Isolated sand bar squeezed between ocean waves and river currents.
Ju Zara from Brasil · CC BY 2.0
Peixe à delícia made with grilled robalo and fried plantains.
Bradleyzm · CC BY-SA 4.0highlights

landmark
Four-wheel-drive trucks traverse 12 kilometers of deep sand to reach these pristine dune pools. Bring cash for park guides.
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landmark
A steep wooden staircase leads up a 30-meter sand dune. Climb at sunset when temperatures drop and light flattens.
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landmark
This 160-step navy lighthouse in Mandacaru offers 360-degree views of river, dunes, and ocean. Entry is free.
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areas

Paved riverfront strip with tour agencies, craft stalls, and evening eateries.
附近Beira-Rio ferry pier
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Quiet residential bank along the river hosting resort-style pousadas.
附近Resort docks
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Isolated sand bar squeezed between ocean waves and river currents.
附近Atlantic coastline
问问 ParleySleepy fishing community anchored around the navy lighthouse.
附近Farol da Preguiças
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Barreirinhas dining centers on freshwater river fish, sea shrimp, and regional Maranhão ingredients. Most restaurants line the Beira-Rio boardwalk, where dinner service starts after 19:00. Expect heavy use of tucupi, manioc flour, and freshly harvested babassu oil in local marinades.

Peixe à delícia made with grilled robalo and fried plantains.
Bradleyzm · CC BY-SA 4.0Locals favor robalo (snook) and surubim catfish grilled whole over charcoal, served with farofa de dendê.
Kitchens along the riverfront close earlier than in state capitals like São Luís.
Street vendors selling tapioca crepes near Praça do Trabalhador often lack card terminals.
history
Founded as an agricultural outpost along the Rio Preguiças, Barreirinhas spent centuries as a quiet manioc and cashew growing hub. The creation of Lençóis Maranhenses National Park in 1981 transformed the town into a transit node for desert tourism.
Municipal founding
Barreirinhas officially separated from Chapada to govern river trade along the Preguiças valley.
National Park created
Federal decree established Parque Nacional dos Lençóis Maranhenses, protecting 155,000 hectares.
Paved highway access
Completion of the MA-225 road connected Barreirinhas directly to São Luís by land.
UNESCO recognition
UNESCO added Lençóis Maranhenses to the World Heritage list, boosting global conservation funds.
where to stay
Choose by your preferred balance between transit convenience and evening quiet. Central pousadas put you steps from tour departures and dinner spots, while riverside resorts in Boa Vista trade walking access for swimming pools and gardens.
transport
Barreirinhas has an airport with commercial passenger flight service. Most visitors fly into São Luís (SLZ) and travel 250 kilometers east by highway across Maranhão.
从São Luís Airport (SLZ)出发
Departs from São Luís bus terminal via Jardineira or CISNE lines.
Pre-booked air-conditioned vehicle direct from arrival terminal.
Vans collect passengers from hotel lobbies in São Luís between 05:00 and 07:00.
Modified open-air 4x4 trucks serve as the main transport to dune trails outside town.
Speedboats departing for Atins adjust departure times depending on river sandbar depths.
Hourly quad rentals on Caburé beach require cash and a quick inspection before riding.
cost
Prices in Barreirinhas spike during the lagoon peak season from June to August. Cash remains essential for park guide fees, street food, and small boat crossings.
Covers round-trip truck transport and guided walking circuit through Lagoa Azul or Bonita.
Day trip along Rio Preguiças with stops at Vassouras, Mandacaru, and Caburé.
Standard meal for one person at riverfront restaurants along Beira-Rio.
Per group day rate for mandatory certified guide on custom sand treks.
seasonality
JAN – APR
Heavy rain fills the dune basins. High water levels build up while tours face frequent downpours.
MAY – JUL
Peak season. Lagoons are full, skies clear up, and daytime temperatures remain around 30°C.
AUG – SEP
Lagoons remain deep with warm water. Strong winds begin to smooth dune ripples.
OCT – NOV
Smaller lagoons dry out completely into bare sand. Only deep permanent pools retain water.
DEC
Dunes are mostly dry sand valleys. Heat reaches peak levels before rains start in January.
practicalities
White quartz sand intensifies solar radiation. Sunscreen and UV shirts are mandatory.
Navigating dunes without an ICMBio-certified guide is illegal and dangerous.
Bradesco and Banco do Brasil have ATMs in Centro, but cash runs out on holiday weekends.
Cellular signal on dune borders and beach bars frequently cuts out during peak hours.
Fine windblown sand penetrates cameras, phone ports, and footwear.