The Department of Conservation is warning trampers to avoid travelling the track following the slip, which has made a section of the track between Centre Pass and Kintail Hut impassable and narrowly missed a walkwire bridge over the Seaforth River.
Department of Conservation operations manager Hamish Angus said a helicopter operator reported the slip on Thursday.
"We've checked the area, confirmed it's wiped out a large section of the track and are advising trampers to stay away from this area of the Dusky until it has stabilised and a new route is marked."
The slip could still be active and department would not be sending in a crew to mark a new route until it was confident it was safe to do so.
He did not know how long that might be, but it would be at least until a good rainfall had stabilised the slip.
Trampers could still tramp between Lake Hauroko and Supper Cove, in Dusky Sound, he said.
