Lençóis Maranhenses is one of those places that doesn't look real. Miles of white sand dunes carved by wind, filled with clear blue lagoons after the rains. It's unlike anything else in Brazil or the world.
I first visited 10 years ago and hit it at the perfect moment, lagoons full, water warm, dunes golden in the late sun.
I went back this January 2026 expecting the same magic and found… dry sand.
No lagoons. A very different experience. So I'm writing this guide so you don't make the same mistake, and to give you everything you need to plan a trip worth the journey.
Table of Contents
General Info of Lençóis Maranhenses
Lençóis Maranhenses National Park was established in 1981 and covers 155,000 hectares in the state of Maranhão, northeastern Brazil. It was declared a UNESCO World Heritage Site in July 2024, recognized for its exceptional natural beauty and characteristics that exist nowhere else on Earth.
The park includes 70 km of Atlantic coastline and an interior made up of vast coastal dune fields that formed during the late Quaternary period. Rivers like the Parnaíba and the Preguiças carry sand from the interior, which winds then push up to 50 km inland, building dunes that reach up to 40 meters high.
Why Is It Famous?
What makes Lençóis Maranhenses truly unique is the contrast between a landscape that looks like a desert — but isn't. The park receives around 1,200 mm of rain per year, which is five times more than what qualifies as a desert.
About 70% of that rainfall comes between January and May, filling the valleys between dunes with freshwater lagoons up to 100 meters long and 3 meters deep.
These lagoons don't drain because impermeable rock sits just below the sandy surface. The result is a mosaic of white sand and turquoise water stretching as far as you can see.
Where Is Lençóis Maranhenses?
The park sits on the northeastern coast of Brazil, around 250 km east of São Luís, the capital of Maranhão. São Luís is your main entry point to reach Lençóis Maranhenses. Fly into São Luís airport (SLZ), which connects through hubs like São Paulo, Brasília, Recife, or Fortaleza.
From São Luís, the transfer to Barreirinhas takes around 4 hours by van or car. Santo Amaro is slightly closer at around 3h30. The park spans three municipalities — Barreirinhas, Santo Amaro, and Atins — each with their own access points and lagoon circuits.
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Which City to Stay at Lençóis Maranhenses?
This decision shapes your whole trip. The park is massive and covers three base towns, each with different lagoons, logistics, and vibes. The debate between Barreirinhas, Santo Amaro or Atins really comes down to what you want to prioritize.
Base | Best for | Infrastructure | Lagoons |
|---|---|---|---|
Barreirinhas |
First-timers, groups |
Best — hotels, restaurants, agencies |
Lagoa Bonita, Lagoa Azul |
Atins |
Kitesurf, chill vibes |
Rustic, no cars, boat access only |
Less crowded circuits |
Santo Amaro |
Best lagoons |
Basic, book early |
Lagoa das Emendadas, Andorinhas |
Barreirinhas
Barreirinhas is the main hub for Lençóis Maranhenses trips. It’s the most visited, best-connected, and most developed of the three bases. It sits on the banks of the Preguiças River and is where most agencies, hotels, and restaurants are based.
Nights in Barreirinhas are actually worth your time. The waterfront strip along the river picks up after dark — cold beers, live forró music, plastic chairs spilling onto the pavement. It has a low-key energy that's easy to enjoy after a full day on the dunes.
Worth noting: the lagoons accessible from Barreirinhas (Lagoa Azul and Lagoa Bonita) are the busiest in the park. Still worth seeing, but you'll share them with other groups.
That's where I stayed for 3 nights. I did the tours from there, and honestly the crowds weren't bad. The sunset dune spot got busy, but during the afternoon walks between lagoons, it was manageable.
The town itself stays pretty relaxed. The Rio Preguiças boat tour felt slightly busier by comparison, more groups on the water. And that was off-peak. Come during June or July after the rains end, and expect noticeably more people across the board.
Atins
Atins is a fishing village reachable only by boat from Barreirinhas .
It’s a 1h30 hour trip down the Preguiças River that's already half the fun. There are no cars here, no banks, and limited infrastructure. Bring cash and be ready to walk or rent a buggy to get around.
What you get in return is one of the most charming corners of this entire region. The lagoons around Atins see far fewer visitors, meaning you can swim without a crowd around you.
The village also draws international kitesurfers. The season start in August until January, the sky above Atins beach is dotted with kites, which is a scene in itself. If you can, include at least two nights here.
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Santo Amaro
Santo Amaro sits closest to the heart of the park, which means transfers to lagoons are much shorter than from Barreirinhas.
From here, you can access Lagoa das Emendadas, Lagoa da América, Lagoa da Betânia, and the Circuito Andorinhas, widely considered the most scenic lagoons in Lençóis Maranhenses.
The trade-off is infrastructure. Hotels and pousadas are limited, so book well in advance, especially for peak season.
If you only have time for one base and want the best lagoon experience, Santo Amaro is the one. But if you're short on time and want the easiest logistics, go with Barreirinhas.
When prepping my trips, I book hotels well in advance for the best deals and top spots—they fill up fast. I stick to Booking.com, all the hotels are listed there.
Weather and Best Time to Visit Lençóis Maranhenses
The best time to visit Lençóis Maranhenses is May to September, when rains have ended, skies are stable, and the lagoons are fully formed and ready to swim in. June and July are peak season, with full lagoons, warm temperatures around 31-33°C, low humidity, and almost no rain.
- January–April: Dry to rainy transition. Lagoons either absent or just starting to fill. Trails can be muddy. That's exactly when I went in January 2026, dunes everywhere, but no lagoons.
- May: Rains ease off, lagoons are full, fewer tourists, lower prices. Arguably the best month if you want a balance.
- June–July: Peak season. Everything full. Lively atmosphere.
- August–September: Still great. Less crowded after school holidays end (north hemisphere). Last chance to see full lagoons before they start receding.
- October–December: Lagoons shrink and disappear. Quieter, better for dune photography and trekking without water.
One thing to keep in mind — rainfall varies year to year, so check conditions close to your travel dates.
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Tours to Visit Lençóis Maranhenses
Only certified vehicles can operate inside the park, so all Lençóis Maranhenses tours go through licensed agencies based in your chosen town. Book on arrival or in advance during peak season. Prices shift depending on group size and season.
Day Tour - 4x4
The 4×4 tour is the most popular option from Barreirinhas and Atins.
You load into an open-back 4×4 with a small group, drive into the park, and stop at multiple lagoon circuits for swims and dune climbs. Lagoa Azul and Lagoa Bonita are the main stops from Barreirinhas.
It's the easiest way to cover ground fast and the tour I've done both times visiting. First trip, the 4×4 drove directly onto the dunes and we mixed driving with walking.
This time around in January 2026, the dry sand made the dunes too soft for vehicles, so the 4×4 dropped us at the entrance and we walked the whole circuit, which is actually a solid experience in its own right.
- Full-day trip to Lençóis Maranhenses, Lagoa Azul & Lagoa Bonita combined
- Lagoons, Atins & Canto do Atins in One Day Tour
From Santo Amaro :
Day Tour - Quad
From Santo Amaro, quad tours give you a more private take on the dunes. A guide leads you on a 3-4 hour circuit through dunes, mangroves, and lagoon spots like Andorinhas. You get far more freedom of movement than in a shared 4×4.
It's louder, dirtier, and that's the point. A good pick if you want the dunes on your own terms.
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Night Tour
Leave town around 5 PM, reach a high dune by sunset, and stay for a proper stargazing session. No light pollution, clear skies between May and September, the Milky Way is visible with the naked eye! Guides explain constellations, fruit and water are provided, and you're back by around 9 PM.
Check the moon phase before booking: a full moon competes with the stars and affects the whole experience.
Plane Tour
A 20-30 minute flight from Barreirinhas airport. Only Barreirinhas has an airstrip, so this tour is exclusive to that base. You fly low over the full park in a small Cessna, spotting dune patterns, lagoons, the Preguiças River, and riverside villages like Vassouras from the air.
It's not cheap, but the perspective is completely different to anything you see on the ground. Worth it once, especially for photographers.
3 Days Trek
This is the deepest way to experience Lençóis Maranhenses. You depart Barreirinhas at 5 AM, ride 2 hours by 4×4 to the park edge, then hike: 6 km on day one, 12 km on day two, and 14 km on the final morning, finishing in Santo Amaro. The route can also run the other way around, starting from Santo Amaro and ending in Barreirinhas.
Along the route, you pass through two isolated communities: Baixa Grande and Queimada dos Britos. Local families host you for the night in hammocks with home-cooked meals.
I wanted to do this in January 2026. The problem — no lagoons. The whole appeal of the trek is swimming in the lagoons between hikes. Without water in them, it becomes a serious sandy slog with little reward. Only attempt this trek between May and September when lagoons are full. Outside that window, it's simply not worth the effort.
When I plan my trip, I usually look at each city I’ll travel to and check all the activities offered on Get Your Guide to get an overview of what’s available and at what price.
Other Tours from Barreirinhas: Rio Preguiças
The Rio Preguiças boat tour is an excellent add-on day with river, jungle, dunes, and one of the more unusual landscapes in northeastern Brazil. It runs as a full-day speedboat trip from Barreirinhas pier up the Preguiças River.
Boat Tour
The boat winds through narrow mangrove channels with dense jungle on both sides.
The highlight early on is the village of Vassouras, where wild monkeys hang in the trees right next to the riverbank — you get close enough to see them clearly without leaving the boat.
Dunes appear alongside the river as you go deeper, creating a strange and genuinely memorable landscape.
Visit of a Small Island and Its Lighthouse
The boat docks at Mandacaru, a small island with a lighthouse you can climb. From the top, you see the river splitting below, dunes on one side, the Atlantic on the other. It's a clean, wide view — one of the better photo spots on the whole tour. The village at the base is simple and quiet, a good stretch stop.
Lunch at the End of the River
The tour ends at Caburé beach, the narrow strip of sand where the Preguiças River meets the sea. It's genuinely one of the more unusual spots I've come across — wide river on one side, ocean waves on the other, dunes in between. As a backpacker, I found the lunch pricey. One thing to know if you're traveling solo — menu prices are listed for two people, so make sure to ask for the single-person price, which runs around 60-70% of that. But the setting makes up for it.
The whole tour is worth booking for a day when you want a break from the dunes. You see things you wouldn't otherwise — river ecology, local communities, and wildlife — all in one loop.
Conclusion
Lençóis Maranhenses is worth it, but only if you time it right. Go between May and September, period. The dunes are always there, but the lagoons are what make this place unlike anywhere else.
Plan at least 4-5 days so you can mix dune circuits with the Rio Preguiças tour and explore more than one base.
If you're routing through northeastern Brazil, combine it with Jericoacoara, I've written a full guide on that too.
Freebie For You !
Thanks for sticking around until the end — that really means a lot. To show my appreciation, I’ve prepared something special for you: a Travel Guide 101 packed with my favorite tips, useful websites, and practical info to help you plan your next adventure.
