The Okaihau Branch, sometimes called the Kaikohe Branch and rarely the Rangiahua Branch, was a branch line that connected to the North Auckland Line of New Zealand's national railway network at Otiria. It was New Zealand's northernmost line and was intended to run as far as Kaitaia. It opened to Ōkaihau in 1923 and closed in 1987.
After the line closed, the New Zealand Railways Corporation retained ownership of the trackage in the hope that forestry plans would be implemented. The corridor is still owned by the Railways Corporation.
Pou Herenga Tai - Twin Coast Cycle Trail
The Kaikohe Rau Marama Community Trust proposed converting the trackbed between Ōkaihau and Kaikohe into a walking and cycling trail, similar to the Otago Central Rail Trail and Little River Rail Trail in the South Island. This was the first step. The 87 km (54 mi) Twin Coast Cycle Trail from Opua to Horeke was fully opened in 2017.