Colombian Massif (from the Spanish Macizo Colombiano) also known colloquially as Nudo de Almaguer (Node of Almaguer) refers to a group of mountains in south central Colombia, in which 70% of the Colombian safe water for human consumption and irrigation originates; formed by the Magdalena River, Cauca River, Caquetá River, Patía River and Putumayo River mainly.
The massif is mainly within the territories of the Cauca and Nariño Departments covering a total area of 32682.37 km².
