The police search for Renee Lisa Barrett, 42, has extended from the Kelvin Heights area of Queenstown to now include a search of the edge of Lake Wakatipu.
Ms Barrett's vehicle was found in Kelvin Heights, but she hasn't been seen since before the weekend.
Police, Queenstown and Wanaka Land Search and Rescue members and the Queenstown Harbour Master are all involved in the search -- with around 30 staff involved.
Residents in the area are requested to check any outbuildings.
Ms Barrett has medical conditions, and both police and family members are concerned for her safety.