The Mangoro begins northeast of the town of
Anjozorobe in the
Analamanga region, at approximately 1,100 meters. Its primary tributaries are the
Onive River (which joins on the right bank at 200 km from the river source) and
Nosivolo River. Its mouth is at the
Indian Ocean near the town of
Ambodiharina. Owing to its many tributaries, the Mangoro maintains a high flow year round, making it an ideal river for rafting. As of 2012, the
Sherritt International Corporation planned to use the Mangoro River as a source of water for a slurry pipeline carrying ore for the Ambatovy project mines, raising environmental concerns. ==Wildlife==