The Rio Fundão ou Rio Reis Magos is a river in Espírito Santo, Brazil, flowing from west to east. It originates in the municipality of Santa Teresa, passes through the town of Fundão where it is known as the Rio Fundão, and empties into the Atlantic Ocean between Praia Grande and Nova Almeida. Its basin covers an area of 700 square kilometers. For paddlers, the river offers a route that can be traced using GPS tracks, such as one titled "Beirando o rio Fundão," which provides a specific kayaking or canoeing trail starting in Fundão. The river is noted for its proximity to the state capital, Vitória, and is recognized as a good location for fishing, particularly for robalo (snook). This suggests a mix of natural and developed surroundings along its course. The river's character likely transitions from inland areas near Santa Teresa through the urban setting of Fundão before reaching the coastal estuary near its mouth.