By RNZ
The Department of Conservation (DoC) is considering restricting the number of people who can enter popular national parks at peak times.
In Tongariro National Park the number of hikers on the Tongariro Alpine Crossing reached 122,200 last summer.
High numbers are again expected over this holiday period, even without international tourists.
Conservation Minister Kiri Allan said DoC was exploring ways to make sure the numbers visiting national parks didn't overwhelm facilities.