Part of the river's basin is covered by the 221,218 hectares (546,640 acres) Jacundá National Forest, a sustainable use conservation unit.[2] Part of the basin is in the 346,861 hectares (857,110 acres) Jaru Biological Reserve, a fully protected conservation unit created in 1984.[3] The river forms the southern boundary in Rondônia of the Campos Amazônicos National Park, a 961,318 hectares (2,375,470 acres) protected area created in 2006 that holds an unusual enclave of cerrado vegetation in the Amazon rainforest.[4]