The Gran Rio joins with the Pikin Rio to form the Upper Suriname River.

[1] The river runs from the northern hills of the Eilerts de Haan Mountains.

It has a stony bottom, forms many tiny islands and has many rapids.

[2][3] The river was first explored in 1908 by Eilerts de Haan to find the source of the Suriname River.

This article related to a river in Suriname is a stub.