The Rahu River is a river of the Tasman 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...

. It rises in two branches (the Left Branch and Right Branch) within Victoria Forest Park. From the junction of these two branches, the Rahu flows initially southeast before turning north to flow into the Maruia River

Maruia River

The Maruia River is located in the northwestern South Island of New Zealand. It is a major tributary of the Buller River, flowing for 80 kilometres before joining the larger river eight kilometres to the west of Murchison....

 five kilometres north of Springs Junction. State Highway 7 follows the upper course of the Rahu to the northwest of Springs Junction, crossing the Rahu Saddle into the valley of the Inangahua River

Inangahua River

The Inangahua River is located in the northwest of New Zealand’s South Island. It is a major tributary of the Buller River, which it joins at the town of Inangahua Junction....

.