The Morona River is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...

to the

Marañón River , name_etymology = , image = Maranon.jpg , image_size = 270 , image_caption = Valley of the Marañón between Chachapoyas (Leimebamba) and Celendín , map = Maranonrivermap.png , map_size ...

, and flows parallel to the

Pastaza River The Pastaza River ( es, Río Pastaza, formerly known as the SumataraEnock, Charles Reginald (1914) ''Ecuador: its ancient and modern history, topography and natural resources, industries and social development'' Charles Scribner's sons, New York ...

and immediately to the west of it, and is the last stream of any importance on the northern side of the Amazon before reaching the

Pongo de Manseriche The Pongo de Manseriche is a gorge in northwest Peru. The Marañón River runs through this gorge (and water gap) before it reaches the Amazon Basin. The Pongo ('gate' in Quechua) de Manseriche is 3 miles (4.8 km) long, located at 4° 27� ...

. It is formed from a multitude of water-courses which descend the slopes of the

Ecuador Ecuador ( ; ; Quechuan languages, Quechua: ''Ikwayur''; Shuar language, Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechuan ...

ian

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

south of the gigantic volcano of

Sangay Sangay (also known as Macas, Sanagay, or Sangai) is an active stratovolcano in central Ecuador. It exhibits mostly strombolian activity. Geologically, Sangay marks the southern boundary of the Northern Volcanic Zone, and its position straddlin ...

; but it soon reaches the plain, which commences where it receives its Cusulima branch. The Morona is navigable for small craft for about 300 miles above its mouth, but it is extremely tortuous.

Canoe A canoe is a lightweight narrow water vessel, typically pointed at both ends and open on top, propelled by one or more seated or kneeling paddlers facing the direction of travel and using a single-bladed paddle. In British English, the term ...

s may ascend many of its branches, especially the Cusuhma and the Miazal, the latter almost to the base of Sangay. The Morona has been the scene of many rude explorations, with the hope of finding it serviceable as a commercial route between the inter-Andean tableland of Ecuador and the Amazon river.

References

Tributaries of the Amazon River Rivers of Ecuador Rivers of Peru International rivers of South America {{Peru-river-stub