The mouth of the river, Torasi Estuary, marks part of the extreme southern boundary between Papua New Guinea and Indonesia.

From the rivermouth, it stretches in a roughly northeasterly direction, and so is entirely located in PNG territory.

It flows through the Trans-Fly savanna and grasslands, including the Tonda Wildlife Management Area.

Europeans first discovered the river on 27 February 1893, and it was named after Jacob Bensbach, Dutch Resident at Ternate, by Sir William MacGregor.

This article related to a river in Papua New Guinea is a stub.