Pigeon Mountain (Ohuiarangi in Māori) is a 55 m high volcanic cone situated in Half Moon Bay near Bucklands Beach, Auckland, New Zealand. It forms part of the Auckland volcanic field and is very popular for scientific school trips. It has been extensively quarried with the entire north side of the volcano removed. The mountain is a former pa site and some of the terracing still remains. Artefacts as well as skulls were found there in the 1960s by students from Pakuranga College. The mountain is open to the public. A 10 minute walk to the top gives good views. The north face is partly fenced off and is an almost vertical drop of 30 metres.
In the southwest corner there is a playing field with changing rooms. On the quarried northwestern side are a BMX track and Scout hall. The sports field is built on a free-draining scoria base.