Mount Roskill

Mount Roskill is both a volcanic peak and the suburban area in the city of Auckland, New Zealand.

Mountain

Mt Roskill was formed as a result of volcanic activity some 20,000 years ago. The peak, which is in Winstone Park to the southwest end of the suburb, is 110 metres in height, and is one of the many extinct cones which dot the isthmus of Auckland, all of which are part of the Auckland Volcanic Field. The scoria cone was built by fire-fountaining from two craters. Lava flowed from the base of the cone to the north and northwest. It was the site of a pā, and was known as Puketāpapa (the flat-topped mountain in Te Reo Māori) and Pukewīwī. The main southern crater was excavated in 1961-62 and filled with a water supply reservoir. The reservoir is no longer in active service, and is only maintained as an emergency supply.

Since 2009, the extension of State Highway 20 passes close to the cone. The effects of the new motorway on the cone had been the subject of significant discussion, and a major mitigation package had been proposed to reduce the impact of the motorway (and the continuation of the Waikaraka Cycleway that runs parallel to it).