Ian Ross, 66, last spoke to his family on 6 September 2024.
His grey Dacia Duster was found in the car park of Beinn Alligin, Torridon, 12 days later and it is believed to have been parked there since 8 September 2024.
Since then, Police Scotland, the Search and Rescue Aerial Association (SARAA) and mountain rescue teams have carried out extensive enquiries – with drones and artificial intelligence (AI) used in the major operation.
Mr Ross, from Dingwall, was reported missing on 17 September last year after his family became concerned they were unable to contact him.
Inspector Daniel Jack said: “A year on from when Ian was last heard from, we are appealing to anyone who is yet to speak to police or may have any information that could assist our enquiries to come forward.
“Extensive searches have been carried out in the past year, including working with our partner organisations to utilise new technology to continue our search in the area Ian was last known to be.
“We have worked alongside mountain rescue, the Search and Rescue Aerial Association and members of the community and would like to thank them for their continued support.
“However, despite our efforts, Ian has not been seen since.”
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Mr Ross is described as white, around 5ft 10ins tall, of medium build with grey hair and grey/blue eyes.
It is not known what he was wearing when last seen, but police said he was an experienced hillwalker and was likely to have been wearing walking boots, a waterproof jacket and carrying a rucksack.
Inspector Jack added: “This remains extremely upsetting for Ian’s family, and we would urge anyone who is yet to come forward to speak to us.
“In addition, we’d ask anyone who was in the area surrounding Torridon around Sunday 8 September 2024 to get in touch with us, no matter how small the information may seem.”
