Rio Formiga

Rio Formiga is a shallow river with gentle current in the Lencois Maranhenses, where the visit is done lying on an inner tube and letting the water carry you along. Locals call it boia cross, and the stretch usually takes around an hour.

The water is clear and the depth is low, which makes the route workable for visitors of different ages. There are no rapids and no physical effort involved: the pace is that of someone floating and looking around.

Because of that calm profile, Rio Formiga often comes at the end of a day of dune trips, as a slower closing. The Vivai catalogue has an active experience passing through here.

In the same area, in Barreirinhas, the catalogue also lists Rio Preguicas, Lagoa Bonita, Lagoa Azul and the Lencois Maranhenses themselves, which makes it easier to plan more than one day nearby.