The Catatumbo River is a river rising in northern Colombia, flowing into Lake Maracaibo in Venezuela. The Catatumbo River is approximately 340 kilometres long. It forms a part of the international boundary between the two countries. The river's name means "House of Thunder" in the language of the Bari people.
The river flows through the Catatumbo moist forests ecoregion.
It then flows through the Maracaibo dry forests ecoregion before emptying into Lake Maracaibo. Prior to emptying into Maracaibo, the Catatumbo River also merges with the Zulia River.
