Police are urging anyone who has seen Yerin An in the Whatawhata or Te Araroa areas to contact them.

A 17-year-old girl appears to have gone missing on a long distance walking track, police say.

Yerin An hasn't been in contact with her family since Thursday night, when she said she was in Whatawhata, on the outskirts of Hamilton, a police statement said.

She is believed to be walking on the Te Araroa walking track.

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"She has not been in contact since and police would like to speak to her to ensure she is safe and well," the statement said.

Anyone who has seen An in the Whatawhata or Te Araroa areas in the last 24 hours can get in touch with Hamilton Police on (07) 858 6200.