​We leave in the morning in 4×4 vehicle to the pier where are going to cross the river by a balsa to access to the National Park. The park has approximately 155 ha. The route of the trail lasts about 45 minutes and then we walk around 15 minutes to the Lagoa Azul (Blue Lagoon), where we will enjoy a refreshing bath. Not far from here is the Lagoa dos Peixes, 20 minutes walking. After these visits we move to the small village of Tratada de Cima to have lunch (not included) and take a rest in hammocks. Around 15:30 we depart to Lagoa Bonita for more baths and see one of the most spectacular views of Lençóis Maranhenses. Return to Barreirinhas after sunset.