What makes Lençóis Maranhenses so extraordinary isn't just the contrast of blindingly white sand against vibrant blue water. It's the sheer sensory experience. The dunes shift constantly with the coastal wind, so the landscape redesigns itself every year. Hiking up a giant dune under the hot sun and diving into a warm, crystal-clear freshwater pool at the top is a feeling that stays with you forever.

Three full days is the sweet spot: you visit the dunes in the early morning and late afternoon, rest in the midday heat, and finish each day floating in the lagoons as the sun sinks into the sand.

• Days 1–2, Barreirinhas or Santo Amaro: classic 4×4 lagoon circuits (Lagoa Azul, Lagoa Bonita) and boat trips down the Preguiças River.
• Day 3, Atins: where the dunes meet the ocean, with a laid-back coastal vibe and rustic dining.

Seasons: high season (June – September) brings peak lagoon levels, clear skies and the highest prices, roughly 10% – 25% above standard rates. Shoulder season (May & October) has standard pricing, better availability and more room to negotiate. Low season (November – April) is the rainy season with the lowest rates, but many lagoons are dry or empty between December and April.

Price guide per person, 3 days / 2 nights: classic hotel-based package (pousada with breakfast, 4×4 and boat excursions, transfers from São Luís or Barreirinhas) R$ 1.500 – R$ 4.400 shared, R$ 4.400 – R$ 8.800+ private. Guided 3-day dune trek across the park (local guide, nights in native homes, meals, 4×4 transfers) R$ 1.800 – R$ 3.300 shared, R$ 3.800 – R$ 6.500 private. Prices are a guide and depend on the season and group size.