High Quality Content by WIKIPEDIA articles! Mount Pirongia is an extinct volcano located in the Waikato region of New Zealand`s North Island. It rises to 959 metres and is the highest peak in the Waikato region. It was active in the late Pliocene and early Pleistocene times. Pirongia`s many peaks are basaltic cones created by successive volcanic eruptions about 2.5 million years ago .