It flows along the eastern boundary of the hydrographic district encompassing Azua, Baní, and San Cristóbal.

[1] In 1496, according to Floyd, "Miguel Diaz and Francisco de Garay, working their way down the Haina river, discovered rich deposits of gold in the river sands perhaps twenty-five miles from the coast."

Bartolome Colon built a fort along this river, "well situated within the gold region", which he named San Cristobal.

[3] Granberry and Vescelius suggest a Macoris etymology for the name haina, comparing it with ha-ina 'many nets' in the purportedly related Warao language of the Orinoco Delta.

This article related to a river in the Dominican Republic is a stub.