The Rio Roncador, also known as Rio do Caldeirão, flows through the Chapada Diamantina region of Bahia, situated between the towns of Lençóis and Andaraí. The river is closely associated with the Marimbus wetland area, a large swamp sometimes called the "Mini Pantanal da Chapada Diamantina," formed by the convergence of the Rio Santo Antônio and Rio Utinga. The surrounding landscape is defined by the Serra do Sincorá mountains and features pink sandstone formations shaped by erosion into natural pools and small waterfalls.

The primary paddling experience on this river involves canoe travel through the Marimbus wetland, a trip that typically takes around 1.5 hours by boat. The waters through the swamp are calm and form channels between aquatic plants and water lilies, making for straightforward paddling suitable for a wide range of abilities. The overall excursion is rated at difficulty level 2 out of 5, described as easy and recommended for everyone. Water levels can vary seasonally — at high water, the crossing of the Roncador itself may require a boat rather than a ford on foot.

Access is typically arranged from the community of Remanso, a Quilombo village founded by escaped slaves, reached by approximately one hour of dirt road travel from the main asphalt road. Some visitors also access the area from Fazenda Velha. The standard route involves a boat departure from Remanso through the Marimbus wetland, followed by a short walk to the Roncador river's swimming area. Return can be made by canoe or on foot through forest trails.

The river's waters are tannin-colored — a tea-like hue — and clear. The main attraction at the river itself is a series of natural pools and small waterfalls carved into the sandstone, used primarily for swimming rather than paddling. Wildlife visible along the wetland portion of the route includes birds, Capuchin monkeys, and on rarer occasions capybaras and caimans. The combination of the swamp passage and the river destination makes this a full-day outing, with lunch typically served at an old farm along the route.