Northern Territory Police has called off the search for Victorian tourist Daymon Ness at Nitmiluk National Park but say his case is still open.
Mr Ness, aged 30, failed to return from a walk in Nitmiluk National Park near Katherine on Tuesday October 20, sparking an extensive air and land search.
Superintendent Daniel Shean said the search included some 28 people over five days, in hot and dangerous conditions.
“We have had to make this decision to call off the search, however the case remains open,” he said.
“We are still asking that if anyone knows or has seen anything that may lead us to Mr Ness, to please come forward.”
Supt Shean said Mr Ness’s parents are quarantining in Howard Springs while another family member has travelled to Katherine from Queensland.
“This has been a trying and challenging time for all involved and I’d like to thank everyone for their sensitivity and professionalism,” Supt Shean said.
The Katherine region has been experiencing severe heat, with temperatures soaring to 40 degrees.
NT Police believe Mr Ness had been travelling alone and arrived in Katherine from Darwin in a hire car on Monday, October 19.
It was reported his car remained in the public carpark at the gorge after he went for a walk at around 1pm on Tuesday.
It has been reported despite the heat, Mr Ness sent a message to a friend informing him he was going for a walk just before 1pm.
“Together with Parks and Wildlife staff and local helicopter operators, we have searched the Katherine Gorge area, including the Jatbula and other trails, campground and the river, without locating Mr Ness,” Supt. Shean said.
Mr Ness is described as a thinly-built Caucasian male, 185-190cm tall, with dark brown hair, and hazel eyes and was last seen wearing a black top, green/grey pants and red shoes.
Anyone who may have seen Mr Ness or knows of his whereabouts or saw him on on Monday or Tuesday, is urged to contact NT Police on 131 444 or CrimeStoppers on 1800 333 000 and quote reference 9458035.