Elderly woman and daughter missing in Vic

Luke Costin

An elderly woman and her disabled daughter last seen four days ago are still missing as authorities search Victoria's northwest from land and air.

The search for Elizabeth Stephens, 89, and her daughter Judy, 53, entered its third day on Thursday after the pair were seen driving towards their hometown of Benalla after a small meal at Tatong Tavern.

They never made the 30-kilometre trip home and were reported missing on Tuesday.

Police say there are "serious concerns" for the welfare of both women due to Ms Stephens' age and her daughter's intellectual disability and insulin dependency.

Tatong Tavern owner Christopher McCabe says the pair did not seem distressed on Sunday.

He said his wife watched as the pair drove off towards their hometown of Benalla.

They could have taken any of the three main routes from Tatong to Benalla, all of which are surrounded by the region's flat farming land.

The pair were reported missing about noon on Tuesday and a search involving the Air Wing, State Emergency Service and Benalla police started four hours later.

Benalla police say the Department of Environment, Land, Water and Planning, Parks Victoria and the SES are part of the search effort.

The women are believed to be travelling in a white 2007 Toyota Yaris with the registration number WAB580.