Lago do Cuniã Extractive Reserve, Extractive reserve in Porto Velho, Rondônia, Brazil

Lago do Cuniã Extractive Reserve is a protected forest area in the Amazon region, centered around a large lake surrounded by sloping shorelines and natural hillsides. The terrain shifts between flooded zones and drier slopes with varying forest types.

The reserve was created by federal decree 3.238 of 10 November 1999, reworded on 9 May 2000, and is classed as an IUCN category VI protected area. A deliberative council was formed on 20 June 2006, and its usage plan was approved on 10 July 2013. It is administered by the Chico Mendes Institute for Biodiversity Conservation (ICMBio).

About 50 families, roughly 400 people, live in the reserve and fish for food and sale. Many keep traditional artisan skills, including canoe-making learned from local Indigenous peoples. Artisanal pirarucu fishing is allowed from May to October, while Brazil nut and açaí gathering runs from November to May.

The reserve lies on the west bank of the Madeira River in Porto Velho, adjoining the Cuniã Ecological Station. Artisanal pirarucu fishing is allowed from May to October, while Brazil nut and açaí gathering runs from November to May. Access is by river from Porto Velho; the reserve has no road entry.

The reserve's residents keep a skill learned from the region's Indigenous peoples: building canoes by hand. Roughly 50 families, about 400 people, live inside the reserve and rely mainly on fishing, and artisanal pirarucu fishing is permitted from May to October, while Brazil nuts and açaí are gathered from November to May.