VERIFIED. Aoraki / Mount Cook is the highest mountain in New Zealand. This (Hooker Valley) is one of many hiking/tramping trails in the Mount Cook National Park. Many, relatively easy walks start at Mt Cook Village. ( see: DOC.co.nz ) . . Mt. Cook is the high-point. Until 2014, its height was officially listed as 3,754 metres, but because of a land-slip & rock-fall new measurements have given a revised height of 3,724 metres (12,218 ft).It lies in the Southern Alps, the mountain range which runs