The Nascentes do Lago Jari National Park has an area of 812,745.18 hectares (2,008,337.1 acres).

[3] The park protects the basin of the Jari River, an important right tributary of the Purus in its middle course, as well as the natural resources and associated fish.

[3] The Nascentes do Lago Jari National Park was created by decree on 8 May 2008 and is administered by the Chico Mendes Institute for Biodiversity Conservation (ICMBio).

[3] An ordinance of 9 January 2012 provided for a consistent and integrated approach to preparing management plans for the conservation units in the BR-319 area of influence.

[4] The conservation unit is supported by the Amazon Region Protected Areas Program.