Mount Tongariro is a volcanic mountain and one of the best hiking trails in New Zealand. This 20 kilometer hike, Tongariro Alpine Crossing, takes about 10 hours and is mostly recommended during May to November. Apart from being challenging, this is also one of the most beautiful trails, with some of the most colourful landscapes of unparalleled beauty. The eruptions in the past have created some of the most beautiful craters, and blue lakes that you can spend hours around. A great one day adventure in New Zealand.