Fantail Falls is a waterfall in Mount Aspiring National Park, Westland District, New Zealand. The waterfall is in the Haast Pass, between the Gates of Haast and the pass itself, at an altitude of 450 metres. It marks where Fantail Creek enters the Haast River, with a drop of 23 metres. Its name derives from the way it spreads out into the shape of a fan at its base, rather than any similarity to the tail of the native bird known as the fantail.