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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.
With another busy summer right around the corner, she said visitors to Roys Peak were being encouraged to find alternative means to get to the base of the track in order to reduce the number of cars there.
"We recommend other options to our customers during busy periods such as getting dropped off by friends, a commercial operator, carpooling, walking or cycling along the Roys Bay-Glendhu Bay track."