From Roxburgh the river continues southeast past the towns of Ettrick, Millers Flat, and Beaumont, before flowing through the Rongahere Gorge, admired for its native bush corridor and for the Birch Island native tree reserve. Beyond here, the river is met by the Tuapeka River at Tuapeka Mouth. At this point the river turns southward, before being met by its last major tributary, the Pomahaka River, which joins the Clutha / Mata-Au from the coast. The river passes the town of Balclutha before widening into the Clutha delta which contains the large flat island of Inch Clutha. Here the river divides into two distributary branches. The Matau (northern) branch flows past Kaitangata. The southern branch is called the Koau. Both branches flow into the Pacific Ocean at Molyneux Bay.