Reece Rodger, from Fife, was final seen within the Kinloch Rannoch space of Perthshire at 11.30pm on Saturday.
He had been tenting on the shore of Loch Rannoch.
Associates of the 28-year-old informed officers they believed he was going to mattress after they final noticed him.
There was no hint of him on Sunday morning.
Sergeant Lindsay Brown of Blairgowrie Police Station mentioned: “We’re extraordinarily involved for his security as he isn’t dressed for the chilly climate and he isn’t accustomed to the world.
“Searches and inquiries are ongoing to hint him as quickly as doable to make sure that he’s secure and nicely.”
Mr Rodger is described as being 6ft tall, slim with dark-coloured hair.
He was sporting a black T-shirt and black jogging trousers.
Sgt Brown added: “I might urge anybody who has seen Reece, or who has any data on his whereabouts, to contact police. I might additionally ask anybody residing within the native space to please verify their outbuildings or sheds in case he has taken shelter there.”
Any data needs to be handed to 101 quoting reference quantity 1348 of March 19.
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