Mamoré River

The second one in Top 9 Longest Rivers in Bolivia that Toplist wants to introduce to you is Mamoré River. The Mamoré is a large river in Brazil and Bolivia that joins the Beni to form the Madeira, one of the Amazon's largest tributaries. It begins on the northern slope of the Sierra de Cochabamba, east of Cochabamba, and is known as the Chimoré until it meets the Chapare. The Chapare, Secure, Apere, and Yacuma come from the west, and the Ichilo, Guapay, Ivari, Manique, and Guapore come from the east.

The Guapay should be considered the upper part of the Mamore based solely on its length; however, it is shallow and obstructed, and carries a much smaller volume of water. Guapore rivals the Mamore in length and volume, with its headwaters in the Parecis plateau of Mato Grosso, Brazil, just a few miles from streams flowing north to the Tapajos and Amazon, and south to the Paraguay and Paraná rivers. The Mamore is cut off by rapids a few miles above its confluence with the Beni, but a 300-kilometer-long railway has been built from below the Madeira rapids. The river is navigable above the rapids all the way to Chimoré at the foot of the Sierra, and most of its tributaries are navigable for long distances. In 1874, Franz Keller calculated the Mamoré's outflow at mean water level, excluding the Guapore, to be 41,459 cm3/sec (2,530 cub. in. per second), and the area of its drainage basin, also excluding the Guapore, to be 24,299 km2 (9,382 square miles).

A large pre-Columbian civilization existed in the Mamore River basin, in the swampy area known as the Llanos de Moxos.

Length: 1,930 km (1,200 mi- shared with Brazil)