It originates in central Jalisco, and flows southward through Jalisco and Colima and there empties into the Pacific Ocean.

[1] The Armería River begins in the state of Jalisco and flows south until it enters the state of Colima, which crosses its central part.

It is the main source of water supply in the region and is the largest, widest and most caudal river in the state of Colima.

In 1922 the distribution of agricultural land and the construction of various irrigation canals such as Periquillos, La Cañita, Independencia and Cuyutlán led to an economic boom in the towns surrounding the river.

This article related to a river in Mexico is a stub.