Two inexperienced trampers owe their lives to the volunteer search and rescue parties that rescued them from the Nelson Lakes National Park on the weekend, police say.
An Irish woman and a Latvian man, both in their 20s, were suffering hypothermia and stranded in falling snow and freezing temperatures when search and rescue volunteers reached them on Sunday morning.
Inspector Mat Arnold-Kelly said he was in no doubt the trampers would have died if they had not been rescued.
"Given their condition when they were found it is unlikely they would have survived very much longer unassisted," he said.
Mr Arnold-Kelly said the three people - one of them a doctor - in the search and rescue team tramped for about nine hours in the dark to find the pair.