The Pukekohe East Explosion Crater is one of New Zealand’s most significant volcanic features — a maar that erupted roughly 680,000 years ago and remains the best preserved and deepest crater in the entire South Auckland Volcanic Field. The crater measures approximately one kilometre across and drops around 80 metres to its floor. It sits on privately owned farmland on the eastern edge of Pukekohe, with Runciman Road and Pukekohe East Road tracing the crest of its rim. Visitors can view the crater from these public roads, and the scale of the feature — a wide, flat-bottomed bowl ringed by a distinct tuff rim — is clearly visible from the roadside.
Practical Information
| Location | Runciman Road / Pukekohe East Road, Pukekohe East |
|---|---|
| Access | View from public roads only — crater floor is on private land |
| Cost | Free (roadside viewing) |
| Nearby landmark | Pukekohe East Presbyterian Church sits on the crater rim |
| Getting there | Head east from Pukekohe on Pukekohe East Road; the crater rim becomes visible as you approach the church |
About the Pukekohe East Explosion Crater
The Pukekohe East Explosion Crater — historically called Papach’s Crater in the early colonial period — formed when rising magma contacted groundwater, triggering a phreatomagmatic eruption. This type of explosion produces a shallow, wide crater (a maar) surrounded by a ring of ejected ash and rock fragments called a tuff ring. At roughly 80 metres deep and one kilometre in diameter, Pukekohe’s maar is the deepest and most intact example in the South Auckland Volcanic Field, which stretches from the Bombay Hills to the Manukau Harbour coast.
The crater floor has been farmed for generations and is not accessible to the public, but the rim road gives a clear sense of its scale. From Runciman Road, you can look inward across the depression and outward over the surrounding Franklin farmland. The tuff ring that forms the rim remains remarkably intact — the reason geologists consider this site the best preserved example in the field.
The South Auckland Volcanic Field is distinct from the Auckland Volcanic Field further north. It includes around a dozen volcanic centres across the Franklin district, formed over several hundred thousand years. Pukekohe East is among the oldest and geologically most significant of these.
The Church on the Crater Rim
In 1863, the Pukekohe East Presbyterian Church was built directly on the rim of the explosion crater — one of the most striking juxtapositions of human settlement and volcanic geology in New Zealand. The church and its surrounding cemetery stand on the elevated tuff rim, and the relationship between the building and the volcanic landform is apparent when you approach from the road. The church is closely associated with the battles of the New Zealand Wars fought in the Pukekohe area in September 1863, and its cemetery contains graves of soldiers and early settlers. The full history of the church is covered in its own post — see the link below.
Visiting the Crater Today
There is no formal track or public access point to enter the crater itself, and the farmland inside is private. The best viewing is from the rim roads — park safely on Runciman Road or Pukekohe East Road and look across the depression. The site is not signposted as a visitor attraction, so most people encounter it while visiting the adjacent church. If you are interested in the volcanic geology of the region, combining a visit to the crater rim with the church and its cemetery makes for a worthwhile short stop from Pukekohe township, about five minutes by car heading east.
en.wikipedia.org/wiki/Pukekohe_East_Explosion_Crater — covers the geology, dimensions and history of the crater, including its classification as the best preserved maar in the South Auckland Volcanic Field.
en.wikipedia.org/wiki/South_Auckland_volcanic_field — details the broader volcanic field that includes Pukekohe East, covering the age, extent, and volcanic centres of the Franklin district.
Frequently Asked Questions
Can you walk into the Pukekohe East Explosion Crater?
No — the crater floor and interior are on privately owned farmland and are not open to the public. The best viewing is from Runciman Road and Pukekohe East Road, which run along the rim.
How old is the Pukekohe East Explosion Crater?
The crater formed approximately 680,000 years ago during a phreatomagmatic eruption — among the oldest volcanic features in the South Auckland Volcanic Field.
What makes it a maar?
A maar is a shallow, wide volcanic crater created when rising magma meets groundwater, causing a steam-driven explosion. The Pukekohe East maar is about one kilometre across and 80 metres deep, with a distinct tuff ring around its edge.
Is there a sign or information board at the site?
There is no formal visitor signage at the crater itself. The Pukekohe East Presbyterian Church nearby has historical information about the area.
How far is the crater from Pukekohe town centre?
The crater rim on Runciman Road is about 5 kilometres from Pukekohe town centre — roughly a 5–7 minute drive east.
Is it part of the South Auckland Volcanic Field?
Yes — it is one of the most significant volcanic centres in the South Auckland Volcanic Field, which covers the Franklin district from the Bombay Hills south toward the Waikato.
Explore more of Pukekohe’s historical and geological sites: Historical and Cultural Sites in Pukekohe covers walking tracks, heritage buildings, and New Zealand Wars sites across the Franklin district. The nearby Pukekohe East Presbyterian Church sits directly on the crater rim and has its own significant New Zealand Wars history.
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