Ōhuiarangi / Pigeon Mountain is a 55 m (180 ft) high volcanic cone at Half Moon Bay, near Howick and Bucklands Beach, in Auckland, New Zealand. The cone forms the last part of volcanic activity that lasted many years. An earlier explosive eruption, created the prominent tuff ring that is still clearly visible extending in an arc south of Sunderlands Road. Two much smaller craters were formed to the north west of the main cone. The smaller lies buried under Pigeon Mountain Road outside number 18, and the other forms 'Heights Park' - a private reserve for the owners of 29 - 41 Pigeon Mountain Road and 14 - 36 Prince Regent Drive and 33 - 39 Tyrian Close. It forms part of the Auckland volcanic field and is popular for scientific school trips. It was first quarried for roading metal by fencibles from the 1847 fencibles settlement at Howick. Quarrying continued for many years. In the 1920s the Shaw brothers worked with Harold Kearney, Dud Langdon and Jim Taylor using a pair of draught horses to pull a dray loaded with metal. In 1848 John Campbell and James Smyth both from the fencible ship Sir Robert Sale, had the contract to spread metal on the road from Howick to Panmure, for which they were paid 5/-per day.