Those attempting the Routeburn Track over winter months are warned alpine experience is essential because staff and bridges are temporarily pulled from the southern walk.
The Department of Conservation says the route is now outside the Great Walk season and reduced facilities and additional hazards face trampers from April through to October.
"Walking the track during this time should only be attempted by fit, experienced and well-equipped people," the Department of Conservation website advises trampers.
The 32km southern walk normally takes three days to complete.
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