The Catlins River flows southeast for 42 km before it empties into the Pacific Ocean. The Catlins River and Owaka River meet at Pounawea at the lower estuary. The Catlins Lake is a tidal upper estuary of the river, about 2 km back from the lower estuary and 6 km from the ocean. It is almost 2 km wide at its widest points and about 4 km long, a sizeable tidal lake and a haven for wading birds.
The Southern Scenic Route reaches the north side of Catlins Lake, about 2.5 km southwest of Owaka. After 400 metres, you will see a lake viewpoint across the lake with some room for parking on the side of the road. The view is superb, especially early in the day at high tide, when it is likely to be still and calm. You can walk along the lake's edge to find a couple of picnic tables and a bird hide. The remains of a wharf below the viewpoint are also a feature.
Continuing southwest on the highway takes you to a bridge over the Catlins River. From there, either continue on the Southern Scenic Route towards Tahakopa Bay and Papatowai or along Pūrākaunui Falls Road. This takes you to Pūrākaunui Falls or to Lakeside Road around the southeast side of the lake. Lakeside Road is the best place for fishing and connects with Hinahina Road, which takes you to Jacks Bay and Blowhole or back to Owaka.
Pounawea is purported to be the Māori name for Catlins Lake, meaning the meeting place of the waters. This is a bit confusing, given the meeting of the two rivers at nearby Pounawea.
