New Zealand State Highway 21

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State Highway 21 NZ.svg

State Highway 21
Route information
Maintained by NZ Transport Agency
Length: 6.7 km (4.2 mi)
Major junctions
Northeast end: SH 1 at Tamahere
  Hamilton Airport
Mystery Creek
Southwest end: SH 3 at Ohaupo
Highway system
SH 20 SH 22

State Highway 21 (SH 21) is a short 6.7 kilometre stretch of highway in the North Island of New Zealand. It links State Highway 1, Waikato Expressway at Tamahere and State Highway 3 at Ohaupo. Its main destination is Hamilton Airport and Mystery Creek, where the National Agricultural Fieldays are held.

SH 21 was gazetted as a brand new state highway designation in 1997.[1]


State Highway 21 is actually 120 km south of where the number is supposed to be; in reality, it should lie somewhere in South Auckland. This southern placement makes SH 21 the second-most southern SH 2x highway, after SH 28.

At the exit to Hamilton Airport, State Highway 21 shows Hamilton to be in both directions (i.e. left to Hamilton and Rotorua, right to Hamilton and Waitomo Caves), and is possibly the only place in the State Highway network in which this happens. The actual difference between turning left and turning right is only 800 metres.

Major intersections[edit]

Territorial authority Location km Destinations Notes
Waikato District Tamahere 0 SH 1 south (Waikato Expressway)/Thermal Explorer Highway – Rotorua
SH 1 north (Waikato Expressway)/Thermal Explorer Highway – Hamilton
SH 21 begins
2 Waikato River
Waipa District
Mystery Creek 5 Hamilton Airport
Mystery Creek Road – Mystery Creek Events Centre
Rukuhia 7 SH 3 south – Waitomo Caves, New Plymouth
SH 3 north – Hamilton
SH 21 ends

See also[edit]


  1. ^ "Revoking Sections of State Highways Declaring New Sections of State Highway". New Zealand Gazette. 26 June 1997. Retrieved 5 July 2016. 

External links[edit]