Mamoré River

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For the division of Bolivia, see Mamoré Province.
Mamoré River
Countries Bolivia, Brazil
Source Sierra de Cochabamba
Mouth Madeira River
 - elevation 110 m (361 ft)
Length 1,930 km (1,199 mi) [1]
Basin 241.660 km2 (93 sq mi)
 - average 11.649 m3/s (411 cu ft/s)
Map of the Amazon Basin with the Mamoré River highlighted

The Mamoré is a large river in Bolivia and Brazil, which unites with the Beni to form the Madeira, one of the largest tributaries of the Amazon. It rises on the northern slope of the Sierra de Cochabamba, east of the city of Cochabamba, and is known as the Chimoré down to its junction with the Chapare. Its larger tributaries are the Chapare, Secure, Apere, and Yacuma from the west, and the Ichilo, Guapay, Ivari, Manique, and Guapore from the east. Taking into account its length only, the Guapay should be considered the upper part of the Mamore; but it is shallow and obstructed, and carries a much smaller volume of water. The Guapore also rivals the Mamore in length and volume, having its source in the Parecis plateau, Mato Grosso, Brazil, a few miles from streams flowing north-ward to the Tapajos and Amazon, and southward to the Paraguay and Paraná rivers. The Mamore is interrupted by rapids a few miles above its junction with the Beni, but a railway 300 km long has been undertaken from below the rapids of the Madeira. Above the rapids the river is navigable to Chimore, at the foot of the sierra, and most of its tributaries are navigable for long distances. In 1874, Franz Keller gave the outflow of the Mamoré at mean water level, and not including the Guapore, as 41,459 cm3/sec (2,530 cub. in. per second), and the area of its drainage basin, also not including the Guapore, as 24,299 km2 (9,382 square miles).[2]


  1. ^ Ziesler, R.; Ardizzone, G.D. (1979). "Amazon River System". The Inland waters of Latin America. Food and Agriculture Organization of the United Nations. ISBN 92-5-000780-9. Archived from the original on 8 November 2014. 
  2. ^ Franz Keller, The Amazon and Madeira Rivers, (New York , 1874)
  •  This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Mamoré". Encyclopædia Britannica (11th ed.). Cambridge University Press. 
  • Edward D. Mathews, Up the Amazon and Madeira Rivers (London, 1879).

Coordinates: 10°23′S 65°23′W / 10.383°S 65.383°W / -10.383; -65.383