Victoria Police are appealing for public help in locating a missing elderly camper with medical conditions and his companion.
Russell Hill, 74, left his Drouin home on March 19 to go on a camping trip across several sites along the Dargo River in Victoria's north east.
Carol Clay, 73, told friends she was heading away for a few days and expected to be home by March 29.
But they have not been heard from since March 20.
Ms Clay's car has been found in Pakenham, and police believe she is with Mr Russell as her belongings were found inside.
Mr Russell, who worked in the logging industry and is familiar with the area, was making regular check-ins to friends via radio daily. In his last radio call he advised he was having transmission issues.
Police are continuing their search of the Wonnangatta area and will be assisted by local police, search and rescue teams, the SES and Parks Victoria.
The disappearance is out of character for the duo, and police are concerned due to the length of time they have been missing and Mr Russell's medical conditions.