There are several rivers named Cachoeira River in Brazil:

Cachoeira Grande River, Bahia Cachoeira River (Bahia) Cachoeira River (Paraná) Cachoeira River (Potinga River tributary), Paraná Cachoeira River (Joinville), Santa Catarina Cachoeira River (Timbó River tributary), Santa Catarina Cachoeira River (São Paulo)