The Rough River, alternatively known as the Otututu River is a river of the West Coast Region of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

's South Island

South Island

The South Island is the larger of the two major islands of New Zealand, the other being the more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, to the south and east by the Pacific Ocean...

. A major tributary of the Grey River

Grey River

The Grey River / Māwheranui is located in the northwest of the South Island of New Zealand. It rises in Lake Christabel, one of numerous small lakes on the western side of the Southern Alps,12 kilometres southwest of the Lewis Pass, and runs westward for 120 kilometres before draining into the...

, it flows south from its sources near Mount Uriah in the Paparoa Range 20 kilometres southeast of Charleston

Charleston, New Zealand

Charleston is a village in the South Island of New Zealand located 30 km south of Westport. It was founded as a goldmining town after a major goldrush in 1867, and is now an adventure tourist village noted for its extensive limestone caves and caving experiences.- History :Charleston’s origins...

, to reach the Grey River to the southwest of the settlement of Ikamatua

Ikamatua

Ikamatua is a small village on the West Coast of the South Island in New Zealand.It is located on the State Highway 7 inland route, 50 km north of Greymouth and 28 km south of Reefton...

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The river is currently shown on maps as Otututu (Rough) River, although this orthography is no longer common for New Zealand Rivers.