Twin Coast Discovery Highway
The Cape Reinga lighthouse, at the northernmost tip of the Twin Coast Discovery Highway
Route information
Length	800 km (500 mi)
Location
Country	New Zealand
Highway system
New Zealand state highways Motorways and expressways List

The Twin Coast Discovery Highway is an 800-kilometre (500 mi)^[1] circular road route of Northland, a region located in New Zealand.^[2] Most of the route travels on part of State Highway 1 (SH 1), the longest and major road in New Zealand, but some parts spur off onto other roads. It is commonly used as a tourist route, most of the time to visit Cape Reinga. The name "Twin Coast Discovery" is so named because the route up to and back from Cape Reinga are on different coasts.

Route

Twin Coast Discovery Highway begins in Central Auckland, on SH 1. It travels onto the Auckland Harbour Bridge and begins to travel through the North Shore of Auckland, north of the Waitemata Harbour. It begins to cross through rural farmlands, and enters an automated toll road, passing through the Johnstones Hill Tunnels. SH 1 narrows to two lanes,^[3] and continues through Puhoi. Soon, the road passes through Warkworth and Wellsford, before crossing into Northland.

The route continues on SH 1 until the road meets the town of Brynderwyn. From there, the route turns west on SH 12, passing through Maungaturoto and a few other small settlements. For 30 kilometres (19 mi), the route goes west, before entering the town Ruawai, a settlement placed directly next to the Wairoa River. From there, the road turns north, and parts of it are situated right next to the Wairoa River. The route passes through the town of Dargaville and continues north. It briefly goes through Waipoua Kauri Forest,^[4] a forest that is well known for having Tane Mahuta, the largest tree in all of New Zealand. The route reaches Ōmāpere, before turning right.

Soon, it reaches the town of Kaikohe, before the route briefly turns left onto SH 15, before turning left onto SH 1, reconnecting with the road. It passes through a few small settlements such as Okaihau, Rangiahua, Umawera, Mangamuka, before it reaches the town of Kaitaia. From there, the route continues going north, passing through several small settlements until it reaches Cape Reinga, the main tourist attraction of the route, and the very top of the North Island.^[5]

The road turns south, and reaches the town of Awanui, which the route turns east onto SH 10. It continues going east, passing through Coopers Beach, and a few other small towns. It begins to turn south, nearing the town of Kerikeri. Soon, it passes through Oramahoe, and finally reaches Pakaraka, and reconnects with SH 1. SH 1 continues going south, until it reaches Whangarei, skirting through the south-western Whangarei Harbour, and then to south of the city.^[6]

It begins to near the coast of Ruakaka, before going up the Brynderwyn Hills, and down to meet the town of Brynderwyn, soon entering into the Auckland Regional Boundary, then passing the towns of Warkworth and Wellsford. It passes through the Johnstones Hill Tunnels, and widens to 4 lanes. The road crosses through rural farmlands, before passing through the North Shore, and finally reconnecting with Central Auckland.^[4]

Major junctions

Region	Location	Jct	Destinations
Auckland Region	Auckland CBD		Twin Coast Discovery Starts
			SH 16 (Northwestern Motorway) – Port, Waitakere, Helensville
			SH 16 west (Northwestern Motorway) – Waitakere, Helensville
			SH 16 east (Northwestern Motorway) – Port
	Unsworth Heights		SH 18 (Upper Harbour Highway) – Greenhithe, Waitakere, Mairangi Bay
	Puhoi		Toll Point
	Wellsford		SH 16 (Port Albert Road) – Helensville, Port Albert
Northland Region	Brynderwyn		SH 12 – Dargaville
	Dargaville		SH 14 (State Highway 14) – Whangarei
	Dargaville		SH 12
	Kaikohe		SH 15 (Mangakahia Road)
	Kaikohe		SH 12 (State Highway 12)
	Okaihau		SH 1
	Awanui		SH 10 – Doubtless Bay, Bay of Islands
	Cape Reinga		Destination

References