A search is underway for a young Kiwi woman who vanished three days ago on a remote island in British Columbia, Canada.

On Monday at 9pm local time (6pm Tuesday NZT), Shilanne Stedmances, 23, left her family home on Bowen Island and has not been seen since.

The Bowen Island Royal Canadian Mounted Police (RCMP) has launched an extensive search for Stedmances, including search and rescue, air services, marine search and rescue and the fire department.

FACEBOOK Shilanne Stedmances's hair used to be blonde, but it is now dark brown and shoulder length.

Stedmances was last seen wearing a dark shirt and yoga pants. Her hair used to be blonde, but it is now dark brown and shoulder length.

She has been described as about five feet and two inches tall and weighing about 50 kilograms.

Anyone with information about Stedmances's location is asked to contact Bowen Island RCMP, their local police detachment or Crime Stoppers at +1-800-222-TIPS (8477).

The Ministry of Foreign Affairs and Trade is aware of the case and is in touch with local authorities. For privacy reasons no further information will be provided, a MFAT spokesperson told Stuff.