McLennan Hills (also Te Aponga o Tainui) is one of the volcanoes in the Auckland volcanic field.
It was a group of cratered scoria mounds up to 45 m high, before it was quarried away.
McLennan Hills, alongside neighbouring Ōtāhuhu / Mount Richmond, were the sites of fortified pā in pre-European times, important due to their location between the Waitematā Harbour/Tāmaki River and the Manukau Harbour.
[1] Since the European settlement of Auckland, the scoria cone was quarried.
This Auckland Region-related geography article is a stub.