Tapajos
| Tapajós River | |
 The city of Itaituba on the banks of the Tapajós River
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| Country | Brazil |
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| Tributaries | |
| - left | Juruena River, Arapiuns River |
| - right | Teles Pires, Cururu River, Das Tropas River, Crepori River, Jamanxim River |
| Source | |
| - location | Juruena–Teles Pires junction, Brazil |
| - coordinates | 7°20′15″S 58°8′35″W / 7.33750°S 58.14306°W |
| Mouth | Amazon River |
| - location | Santarém, Pará State, Brazil |
| - coordinates | 2°24′30″S 54°44′12″W / 2.40833°S 54.73667°WCoordinates: 2°24′30″S 54°44′12″W / 2.40833°S 54.73667°W |
| Length | 1,930 km (1,199 mi) |
| Discharge | |
| - average | 13,540 m3/s (478,161 cu ft/s) |
 Map of the Amazon Basin with the Tapajós River highlighted
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The Tapajós (Portuguese: Rio Tapajós [ˈʁi.u tɐpɐˈʒɔs]) is a river in Brazil. It runs through the Amazon Rainforest and is a major tributary of the Amazon River. When combined with the Juruena River, the Tapajós is approximately 1,200 mi (1,900 km) long. For most of its length it runs through Pará State, but the upper (southern) part forms the border between Pará and Amazonas State. The source is at the Juruena–Teles Pires river junction. The Tapajós River basin accounts for 6% of the water in the Amazon Basin, making it the fifth largest in the system.
From the lower Arinos River (a tributary of Juruena) to the Maranhão Grande falls are a more or less continuous series of formidable cataracts and rapids; but from the Maranhão Grande to the mouth of Tapajós, about 188 mi (303 km), the river can be navigated by large vessels.
For its last 100 mi (160 km) it is between 4 and 9 mi (6.4 and 14.5 km) wide and much of it very deep. The valley of the Tapajós is bordered on both sides by bluffs. They are from 300 to 400 ft (91 to 122 m) high along the lower river; but a few miles above Santarém, they retire from the eastern side and do not approach the Amazon floodplain until some miles below Santarém.
The eastern border of Amazônia National Park is formed by the Tapajós River. From Itaituba and southwest a part of the Trans-Amazonian highway (BR-230) follows the river, while a part of BR-163 runs parallel to the river from Santarém and south.
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Wikipedia