The Clutha River/Mata-Au is the second longest river in New Zealand flowing south-southeast through Central and South Otago from Lake Wanaka in the Southern Alps to the Pacific Ocean, south west of Dunedin.
The Clutha River/Mata-Au is the second longest river in New Zealand and the longest in the South Island. It flows south-southeast through Central and South Otago from Lake Wanaka in the Southern Alps to the Pacific Ocean, south west of Dunedin.