Lençóis Maranhenses Backcountry Circuit
Brazil's Sahara with swimming pools and shifting sands
The Lençóis Maranhenses sprawl across 1,500 square kilometers of pristine white sand dunes that fill with crystal-clear rainwater lagoons between January and September, creating Brazil’s most otherworldly landscape. This backcountry circuit follows rough tracks and beach routes from Barreirinhas through Atins, Caburé, and back via the Rio Preguiças, requiring careful navigation through shifting sands and tidal flats where GPS becomes useless and local knowledge is everything.
This is challenging sand driving that demands deflated tires, recovery boards, and a winch for the deep stuff. High tide blocks some coastal sections, so timing matters as much as technique. Best visited April-July when lagoons are full but access roads aren’t completely flooded. Stock 4WD with good sand tires can handle most of it, but you’ll earn every kilometer fighting through loose sand that swallows overconfident drivers whole.
Trail Specs
| Difficulty | Difficult |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Sand |
| Features | Remote, Scenic, Water Crossings |
| Length (miles) | 112 mi / 180 km |
| Duration | 3-4 days |
| Max elevation (ft) | 200 ft |
| Best season | April-July |
| Minimum vehicle | 4WD with sand tires and recovery gear |
| Nearest town | Barreirinhas, Maranhão |
| Land manager | ICMBio - Lençóis Maranhenses National Park |
| Permit required | Yes |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | icmbio.gov.br |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a lifted Hilux or stock Land Cruiser handle this trail, or do I need something more serious?
A stock Land Cruiser or Hilux will struggle — deep, loose sand here will swallow unprepared rigs. You need a proper 4WD with dedicated sand tires (not all-terrains), low tire pressures down to 12-15 PSI, and a full recovery kit including boards and a hi-lift. Underpowered or short-wheelbase vehicles have a hard time in the longer dune crossings.
When do the lagoons actually have water? Is April really the sweet spot?
The lagoons fill from January through June as the rainy season peaks, with April through July being the ideal window — water levels are high, the dunes are still navigable, and temperatures are slightly cooler. Outside this window, especially August through December, most lagoons are dry and the circuit loses its entire point.
Do I need a permit to drive the backcountry circuit, and can I self-guide or do I need a licensed guide?
Yes, ICMBio requires a permit to enter and drive the park's backcountry. As of recent regulations, a licensed local guide is mandatory for the full circuit — self-guided entry into the interior is not permitted. Arrange this through ICMBio or registered operators in Barreirinhas before you arrive; don't count on sorting it at the gate.
What's the hardest section and what actually makes it dangerous?
The open dune fields between Queimada dos Britos and the Rio Preguiças crossings are the most punishing — no track, no reference points, shifting sand terrain, and zero shade. Getting stuck here without recovery gear and a guide who knows the lines means a very long, very hot wait. The water crossings themselves are tidal-influenced and depth can change fast; crossing at the wrong time is a separate problem entirely.
There's no cell service on the whole circuit — how do people handle emergencies and navigation out there?
Zero cell coverage for the entire 180km. Most serious groups carry a satellite communicator (Garmin inReach or SPOT) for emergencies and pre-load offline GPS tracks, though even those shift as dunes move seasonally. Your guide will be your best navigation asset — this is another reason the mandatory guide rule exists, not just bureaucracy.
Trail track
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