Police are appealing for a camper to come forward as they increase the search effort for missing Warburton woman Susan Shaw.
The 67-year-old was last seen on Mount Donna Buang Road about 1.40am on Saturday.
She was last seen wearing a green cardigan, jeans and bright pink short gumboots, although she may have removed her cardigan due to the warm weather.
Police and family hold concerns for Susan's welfare as her disappearance is out of character.
A large contingent of police officers and SES personnel have been searching Mount Donna Buang Road and surrounding areas over the weekend in search for Susan.
The search continues today with local uniform members, Mounted Branch, Specialist Solo's Unit, Search and Rescue, Air Wing and Dog Squad assisted by SES, DEWLP and Parks Victoria.
Meanwhile investigators are seeking to speak to a camper after the witness who last saw Susan also reported seeing a tent set up on the roadside with a bicycle next to it.
It is hoped the owner of the tent might have information that could assist in the search for Susan.
Investigators have released an image of Susan in the hope that someone can provide information on her current whereabouts.
Anyone who has seen Susan or with any information is requested to contact Warburton Police Station on 5966 2006.
