After crossing the border into Brazil it flows in a north east direction through the 695,303 hectares (1,718,130 acres) Chandless State Park, created in 2004, which protects an area of rainforest with bamboos that contains various endemic species of flora and fauna. The main tributaries of the Chandless in this section are the Cuchichá and Chandless-chá streams. The Cuchicá forms the northern border of the park to the point where it joins the Chandless.