The popular Roys Peak walking track is set to close for lambing from Monday and will remain shut for more than a month.
The closure happens each year from October 1 to November 10.
Department of Conservation ranger Kerie Uren said the car park would have a barrier in place during the closure period to dissuade eager hikers.
No plans were in place to further extend the car park, she said, despite it overflowing significantly during last summer, and a continued increase in track numbers.
Ms Uren said there had been a 12% increase in the number of visitors to the track in the past year compared to the previous year, from 65,213 to 72,985.