São Francisco River

River in Brazil

The São Francisco River (Portuguese: Rio São Francisco, pronounced [ˈʁiu sɐ̃w fɾɐ̃ˈsisku]), known in English as the San Francisco River, is a large river in Brazil. With a length of 2,914 kilometres (1,811 mi), it is the longest river that runs entirely in Brazilian territory, and the fourth longest in South America and overall in Brazil (after the Amazon, the Paraná and the Madeira). It is also locally known as the Velho Chico (pronounced [ˈvɛʎu ˈʃiku]; lit. 'Old Chico', i.e., 'Old Frank'), and was once known as the Opara by the Indigenous people before colonization.

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