Ōtira River

Ōtira River
Upper Ōtira River and Ōtira Viaduct
Route of the Ōtira River
Mouth of the Ōtira River
Ōtira River (South Island)
Location
CountryNew Zealand
Physical characteristics
SourceMount Rolleston
  coordinates42°54′08″S 171°31′23″E / 42.9022°S 171.5231°E / -42.9022; 171.5231
Mouth 
  location
Taramakau River
  coordinates
42°45′43″S 171°37′59″E / 42.762°S 171.633°E / -42.762; 171.633
Length20 km (12 mi)
Basin features
ProgressionŌtira RiverTaramakau RiverTasman Sea
Tributaries 
  leftCurtis Creek, Kea Creek, Park Creek, Hodge Creek, Rolleston River, Goat Creek, Kellys Creek
  rightPegleg Creek, Candys Creek, Reid Falls, Wesley Creek, Barrack Creek, Deception River, Paratu Stream
BridgesŌtira Viaduct, Wallace Point Bridge, Yorkeys Point Bridge, Ōtira River Bridge, Morrison Footbridge

The Ōtira River is located in the central South Island of New Zealand. It rises on the slopes of Mount Rolleston in the Southern Alps, and flows north for 20 kilometres (12 mi), passing through the town of Otira before joining the Taramakau River. The Taramakau's outflow is into the Tasman Sea, 12 kilometres (7.5 mi) south of Greymouth.

The valley of the Ōtira River forms the northwestern approach to Arthur's Pass, one of the three main passes across the Southern Alps.