Police have renewed calls to locate two people missing in the Victorian Alps six months after their disappearance.
Russell Hill was last heard on HF radio in the Wonnangatta Valley on March 20.
He had been camping near the Wonnangatta River with Carol Clay, having left home a day earlier.
Mr Hill's white Toyota LandCruiser was found with fire damage next to their burnt campsite on March 21.
"Despite extensive searches over the past six months, the pair have not been located and have not contacted family or friends," police spokeswoman Natalie Webster said on Sunday.
"It is still yet to be fully determined whether their disappearance is suspicious, but a major investigation has been conducted over the last six months and will continue."
Detective Inspector Andrew Stamper said police hoped to get answers for the pair's families.
"Six months is a long time to be waiting by the phone for information, however police haven't given up," he said.
"When the weather allows, our investigators and specialist search teams will return to the area to conduct further searches in the hope of finding any clues about what has happened to Russell and Carol.
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"We've had a number of people who were in the area around the time they went missing come forward however I can't stress enough that anyone with even the slightest piece of information is urged to contact us."
Vehicles registered in NSW, Tasmania, Queensland and South Australia were seen in the area at the time.
"Potentially there are people now interstate who have some information or need to contact us with their details," the detective said.
"Although six months have passed, police still believe that we can solve this but we need the public's help."
An older person or pair of people were seen at Black Snake Creek, Eaglevale River crossing and the Ollies Jump area on March 22 and 23, but it is unclear if it was the missing pair.
Anyone with information can call 1800 333 000.