"This was a terrible conclusion to what had probably been a fantastic day among the vines, and we wish her a speedy recovery."
Meanwhile three drunk drivers were arrested leaving Toast Martinborough on Sunday, including one who had a breath alcohol reading more than three times the limit.
Masterton police senior sergeant Carolyn Watson said police stopped 398 people at a Ponatahi Rd checkpoint as they left the food and wine festival.
A Masterton man in his 40s was caught with a breath alcohol limit of 1405mcg at the checkpoint - the limit is 400 - and Ms Watson said he was "pretty hammered".