AS THE trail for missing Bundaberg man Paul Stevenson goes cold, his family has become increasingly desperate to find him.
Friends and family have flown in from across the state to help scour bushland near Mt Perry for the father-of-two, who failed to return home from a motorbike ride early Sunday.
His black Honda motorbike and helmet were found just metres from the Gin Gin-Mt Perry Rd on Tuesday.
But extensive searches in the surrounding area failed to find any further trace of Mr Stevenson, with the search for him entering day four today.
Mr Stevenson's sister, Toni Somes, said it appeared her brother was headed towards Mt Perry when his bike crossed over a small concrete gutter and went down an embankment.
"There was no blood at the scene. (His bike) wasn't badly damaged," she said.
Mrs Somes, a journalist in Warwick, said her older brother's wallet and phone were believed to be on him.
"They weren't found at the scene," she said.
"There were a couple of snakes under the bike when they picked it up.
"There's not a lot more that we know."
Mrs Somes said her brother was known to go for Sunday rides without leaving many details of where he was going.
"If there's a message out here for anybody, please let your family know before you go out," she said.
The concerned sister said the five siblings and mum were trying to stay strong for Mr Stevenson's 16-year-old son, Tom.
"He's really struggling - he's been out here searching since Sunday," she said.
Mrs Somes said the family were in "awe" of the number of people who turned up to help search.
"The way the community came together to search for him, we are enormously grateful," she said.
Mrs Somes said Mr Stevenson was well known in the Gin Gin and Mt Perry communities, from his time working as a contract musterer and timber cutter.
"Some of these blokes worked with Paul in the '80s," she said.
Mrs Somes said the family was struggling emotionally and once again pleaded for public assistance.
"If anyone saw anything Sunday morning, it would be great if they could come forward," she said.
"We're pretty desperate to find him."