The Waiotauru River is a river of the Wellington Region of New Zealand's North Island. It flows generally north from two branches, the Waiotauru River (or Southern Waiotauru) and the Eastern Waiotauru (or Snowy) River. Both of these branches have their origins in the southwestern Tararua Range, with the Eastern branch having its origin on the slopes of Mount Hector, and the Southern on Renata. The Waiotauru meets the à Âtaki River at à Âtaki Forks, southeast of à Âtaki.