The Wairahi River is a river 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 Great Barrier Island

Great Barrier Island

Great Barrier Island is a large island of New Zealand, situated to the north-east of central Auckland in the outer Hauraki Gulf. With an area of it is the fourth-largest island of New Zealand's main chain of islands, with its highest point, Mount Hobson, rising...

. It is the only river (so named) on the island — the island's other watercourses all having names ending is "stream". The Wairahi flows generally west, roughly paralleling the island's long southwestern shore, from its origins north of Whangaparapara Harbour. A walking track from Whangaparapara to Port Fitzroy follows the river for part of its length.