The Tongariro Alpine Crossing in Tongariro National Park is a tramping track in New Zealand, and is among the most popular day hikes in the country.The Tongariro National Park is a World Heritage site which has the distinction of dual status, as it has been acknowledged for both its natural and cultural significance.

The crossing passes over the volcanic terrain of the multi-cratered active volcano Mount Tongariro.
Most of the walk is through raw volcanic terrain. The three volcanoes in the area are all highly active and the terrain reflects this. Solidified lava flows, loose tephra, and solidified volcanic lava bombs abound. Large amounts of minerals are brought to the surface and are highly visible in the colours of rocks and ridges. Active fumaroles abound on several sections of the walk, constantly emitting steam and sulphur dioxide gas into the air and depositing yellow sulphur specks around their edges.

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