Sarah Bolton, aged 47, was reported missing on Thursday 31 October 2013, and officers have been making enquiries to trace her ever since.
It is believed that Sarah has links to Scarborough and Whitby and may also have travelled to the South Yorkshire area.
Officers are appealing to anyone in those areas who may have seen anyone matching Sarah’s description to contact them with information.
She is described as white, around 4ft 11in tall, with a medium build, curly shoulder-length brown hair and brown eyes.
Anyone who can help officers with their enquiries is urged to contact North Yorkshire Police on 101 – select option 1 – and pass information to the Force Control Room.
Please quote reference number 12130189012 when passing information about Sarah’s whereabouts.