The view from Roys Peak is something special, but it is becoming ''dangerous'' for visitors to experience it, the landowner says.
The track's 100-space car park, barely a year old since being upgraded in late 2017, is bursting at the seams.
Each day it bulges and spills out on to the narrow Mt Aspiring Rd, and even the neighbouring farmland.
Department of Conservation senior ranger Annette Grieve said 83,296 people used the track last year, including an average of 480 daily visitors in December.
While the obvious solution to the parking woes would be to expand, Ms Grieve said there was no public conservation land left next to the car park to do so.