Ninety Mile Beach is on the western coast of the North Auckland Peninsula. It is terminated by rocky volcanic headlands, Scott Point to the north and Reef Point to the south. Between the two points is a beautiful arching beach of white sand facing the Tasman Sea.
The origin of the name is uncertain, for the beach measures only 55 miles. It can be used as a motorway at low tide and, provided the sudden watercourses which seam the sand are crossed slowly and proximity to the waves avoided, the surface can be used with confidence.
Here is the map of Ninety Mile Beach – New Zealand