The Napo is a tributary to the Amazon River that rises in Ecuador on the flanks of the volcanoes of Antisana, Sincholagua and Cotopaxi. A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ... Length 6,296 km Elevation of the source 5,597 m Average discharge 219,000 m³/ s Area watershed 6,915,000 km² Origin Nevado Mismi Mouth Atlantic Ocean Basin countries Brazil (62. ... A volcano is a geological landform (usually a mountain) where magma (rock of the earths interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. ... Cotopaxi is a volcano in Ecuador, the second highest in the country, (the highest one being the Chimborazo) and one of the highest active volcanoes in the world (the highest active one is assumed to be Ojos del Salado in Chile). ...

Before it reaches the plains it receives a great number of small streams from impenetrable, saturated and much broken mountainous districts, where the dense and varied vegetation seems to fight for every piece of ground. From the north it is joined by the river Coca, having its sources in the gorges of Cayambe on the equator, and also a powerful river, the Aguarico, having its headwaters between Cayambe and the Colombian frontier. Cayambe is the name of a volcano located in the eastern branch of the Ecuadorian Andes, in Pichincha province some 70 km north of Quito. ... The equator is an imaginary line drawn around a planet, halfway between the poles. ...

From the west it receives a secondary tributary, the Curaray, from the Andean slopes, between Cotopaxi and the volcano of Tunguragua. From its Coca branch to the mouth of the Curaray the Napo is full of snags and shelving sandbanks, and throws out numerous canos among jungle-tangled islands, which in the wet season are flooded, giving the river an immense width. From the Coca to the Amazon it runs through a forested plain where not a hill is visible from the river - its uniformly level banks being only interrupted by swamps and lagoons. Note that the geology in this article currently reflects views from the first decade of the 20th century. ... A volcano is a geological landform (usually a mountain) where magma (rock of the earths interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. ... A freshwater swamp swamp (disambiguation) A swamp is a wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions. ... See lagoon (disambiguation) for other possible meanings. ...

From the Amazon the Napo is navigable for river craft up to its Curaray branch, a distance of about 216 miles (350 km), and perhaps a bit further; thence, by painful canoe navigation, its upper waters may be ascended as far as Santa Rosa, the usual point of embarkation for any venturesome traveller who descends from the Quito tableland. The Coca river may be penetrated as far up as its middle course, where it is jammed between two mountain walls, in a deep canyon, along which it dashes over high falls and numerous reefs. This is the stream made famous by the expedition of Gonzalo Pizarro. Santa Rosa, Spanish for Saint Rose, is the name of a number of places: Santa Rosa City, Laguna, Philippines Kaij Mek, Arizona, United States (also known as Santa Rosa) Santa Rosa, California, United States Santa Rosa County, Florida, United States Santa Rosa, New Mexico, United States Santa Rosa, Argentina, the... The volcano Cotopaxi looms over south Quito. ... Gonzalo Pizarro was the leader of the conquistadors in Peru in 1540s. ...

• Napo is also a province of Ecuador.