Wanaka office senior ranger Annette Grieve said work to create a diversion around the damaged section had been delayed by the recent heavy rain and the closure of the damaged access road (Mt Aspiring Rd).
An inspection on Wednesday found more damage to the slip which closed the track in July and additional areas of concern, including a further rock fall and two additional slips, she said.
"At this stage, we are unable to provide a timeframe for the track to reopen. However, we will continue to provide updates as the situation evolves."
The Lake Wanaka Outlet Track and the Upper Clutha River Track also remain closed due to flooding but staff were continuing to monitor the river level and some track repairs would be required once the water had receded, Ms Grieve said.
The opening of the new Blue Pools car park has also been delayed due to the wet weather until late January 2020.
Ms Grieve said NZ Transport Agency had advised the existing Blue Pools track and car park would remain available.
The Newcastle Track and Diamond Lake Track have also been inspected by staff and remain open, she said.
