The Mackintosh River is on the West Coast of Tasmania and flows into the Pieman River. It is north of Tullah. Lake Mackintosh is one of the more substantial hydro man-made lakes on the West Coast.
The eastern most point of the river catchment is defined by Barn Bluff where it is also border with the Murchison River river catchment.
It is in the northern section of the West Coast Range. It was dammed by the Hydro Tasmania in its development of the Pieman power development scheme.
Hydrological measurements on this river by the HEC began in 1955.
Location: 41° 53' S 145° 53' E