Cachoeira do El Dorado, Remote waterfall in Amazonas, Brazil

Cachoeira do El Dorado is a waterfall on the Serra do Aracá in Barcelos, Amazonas, dropping more than 353 metres, the highest in Brazil. It lies within the Serra do Aracá State Park, 211 km in a straight line from the municipal seat. The surrounding terrain includes mountains over 2,000 metres, fast-flowing rivers, river islands and white-sand beaches.

The waterfall lies in the Serra do Aracá, a range of mountains over 2,000 m high in the municipality of Barcelos, in the far north of Amazonas state, about 211 km in a straight line from the town of Barcelos. It is protected within the Serra do Aracá State Park. It should not be confused with the Cachoeira do Aracá on the river of the same name, also called Cachoeira dos Índios after a FUNAI post there, which is a rapid rather than a waterfall.

The name El Dorado is not Indigenous in origin; it was given to the falls, and the nearby Aracá name belongs to a separate feature: the "Cachoeira do Aracá" on the river of the same name is a rapids, not a waterfall, and is also called "Cachoeira dos Índios" after the FUNAI post there. Visitors should not confuse the two.

Reaching this location requires careful planning and local guidance, since no established trails exist and access involves either aircraft or extensive hiking. Visitors should be prepared for challenging terrain and extreme weather conditions typical of remote rainforest regions.

The falls are often confused with the Cachoeira do Aracá on the river of the same name, also called Cachoeira dos Índios after a FUNAI post there; that one is a rapid, not a waterfall. The Serra do Aracá park also holds blue mushrooms, rock crystals and bromeliads.