The river flows south and west, for a time serving as Saldaea's southern border, before turning into the unclaimed and heavily forested lands between the Mountains of Mist and the River Haevin. The river is joined by several tributaries, including the Ivo, before turning sharply eastwards to form the northern border of Andor. Here, where the river is joined by a smaller trbiutary flowing out of the Mountains of Mist, the river passes the fog-shrouded and cursed city of Shadar Logoth. Traders and merchantment plighing the river give the ancient city a wide berth. After being joined by the Haevin, the Arinelle turns south and passes through the Andoran town of Whitebridge before it flows into the Manetherendrelle.