A dad who was on his first-ever canyoning trip has tragically fallen to his death, with rescuers finding his body wedged between rocks and partially submerged in water.

The body of Munib Dar, 39, was found submerged in the Wollangambe River, wedged in-between rocks, on a famous hiking track in Sydney's Blue Mountain region just after 11 am on March 20.

Mr Dar was hiking the intermediate Wollengambe Canyon 2 Track at Mount Wilson when his friend lost sight of him on Sunday afternoon.

His friend was forced to leave Mr Dar after realising he could not help him and hiked back to a spot with phone reception to call emergency services.

Rescuers started searching for Mr Dar at 5 pm on Sunday but had to pause their search due to deteriorating conditions on the mountain.

PolAir and NSW Ambulance were able to continue their search at 9am on Monday amid thick fog, which prevented special operations teams from joining the search.

Mr Dar, who leaves behind a wife and one child, was found dead hours later.

'He appears to have become wedged into some rocks and has submerged in the water,' NSW Police Acting Inspector Lauren Martin said.

'We had very heavy fog, drizzling rain and pretty poor visibility making things really difficult for crews.

'(It's a) very difficult time for the friends who were with the 39-year-old man at the time he got into trouble.'

NSW Police remained with his body overnight due to terrible weather conditions before they could safely airlift him out on Tuesday.

A report is being prepared for the coroner.

The Wollengambe Canyon 2 Track is a 5.8-km trail and is generally considered a moderately challenging route and takes more than two hours to complete.聽

Australian hiking website All Trails聽warns hikers that 'it's unlikely you'll encounter many other people while exploring' in the remote bushland behind Mount Wislon.聽