A rescue on Mount Ngauruhoe is prompting warnings for other trampers.

A helicopter had to pluck two lightly dressed walkers from near the summit on Saturday, wearing street shoes, jeans, t-shirts and hoodies.

Land Search and Rescue head Carl McOnie says they carried out 436 rescues last year.

He says they don't like to worry people by revealing the cost of rescues.

McOnie explained they don't want people to put off calling when they're in dangerous situations.

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