The Rio Macacoari is an 84-kilometer-long river flowing through the state of Amapá in northern Brazil. It is a direct tributary of the Amazon River, contributing to the vast Amazon basin. The river's course winds through the Amapá region, and it is fed by 13 distinct tributaries along its length. For paddlers planning a trip, the river's character is defined by its connection to the Amazonian ecosystem, suggesting a remote and natural environment. Paddlers should anticipate a wilderness experience typical of the region. The river's aesthetic is likely dominated by the dense rainforest landscape of Amapá. Given its location, paddlers may encounter diverse Amazonian wildlife. There are no specific restrictions on paddling, nor are there details on facilities, amenities, or recommended routes. Water quality and temperature patterns for trip planning are not specified. The river's historical or cultural significance is not detailed, but its role as a tributary to the Amazon places it within a globally significant hydrological and ecological system.