The search for a 76-year-old Flinders Island man who has been missing for a month in Tasmania's far south-west wilderness has been called off.

Key points: Despite extensive searching by teams on foot and aircraft, the official operation to find James McLean has been called off

Despite extensive searching by teams on foot and aircraft, the official operation to find James McLean has been called off He was attempting to walk the Huon Track to Melaleuca, a 100-kilometre month-long trek in the state's far south-west

He was attempting to walk the Huon Track to Melaleuca, a 100-kilometre month-long trek in the state's far south-west Mr McLean was known to deviate from his path, understate the number of days he might be away and travel extremely lightly, Tasmania Police have said

A resident of Flinders Island, Mr McLean was last seen around mid November before setting off on what was to be a 100-kilometre month-long trek in the state's far south-west, intending to return by December 13.

Today, Tasmania Police said in a statement while "missing persons cases are never closed … all active air and land searches have now concluded".

Police said they had been in contact with Mr McLean's family throughout, and that the coroner had been notified.

Mr McLean has not been found despite an extensive ground search, covering more than 100 kilometres of walking tracks and an aerial search using night vision equipment.

At the end of last month police reviewed its search efforts to find him.

Mr McLean is a highly experienced bushwalker and is renowned for venturing off-track without adequate supplies.

The terrain in Tasmanian's south west region is known for being thick and dense, and many bushwalkers who enter the area never return.

James McLean signed in at the start of the Huon Track, police said. ( Wordpress/Imahiker )

Last month Hobart Walking Club President Geoff O'Hara told ABC the wilderness could be unforgiving.

"The really intense [scrub] is very difficult to get through … it's very wearing on your body, you get very, very tired," he said.

If anyone has information as to the whereabouts of Mr McLean, they are urged to contact Tasmania Police on 131 444.