Rangiahua is a small locality near the Hokianga Harbour in the Northland Region of New Zealand. State Highway 1 passes through it. Umawera is to the west, and Okaihau to the east. Rangiahua nearly became New Zealand's most northern railway terminus. In 1923, the Okaihau Branch, a branch line from Otiria on the North Auckland Line, was opened to Okaihau and work began on an extension to the Hokianga Harbour and Kaitaia. There were disputes over the viability of the line, but a compromise was reached that would have established Rangiahua as the terminus. Work progressed slowly throughout the 1920s and was abandoned during the Great Depression, even though the line was nearly complete - New Zealand's northernmost railway tunnel had been made and Rangiahua's railway yard and platform had been