A year after a woman's body was found in a stream near a North Yorkshire beauty spot, police have said her identity remains a mystery.
The woman may have died up to three weeks before she was found
Walkers discovered her body between Pen-y-ghent and Horton in Ribblesdale, on 20 September 2004.
Det Insp Pete Martin said global appeals, work with foreign embassies, and a feature on the BBC's Crimewatch programme had so far been unsuccessful.
"Despite all our best efforts, we are still no closer to identifying her."
Experts believe the woman, who was of Oriental appearance and aged between 20 and 40, could have died up to three weeks before she was found.
A post mortem examination could not establish the cause of her death but suggested she died between 31 August and 13 September.
Det Insp Martin said somebody must know who the woman was.
Officers quizzed ramblers on the Pennine Way about the woman
"We owe it to her to find her name and to notify her family," he said.
"She must have a family, friends, perhaps a partner - maybe even a child - and we need to find them.
"She has a name and an identity and I need someone to come forward to restore them to this unfortunate lady."
Police have carried out house-to-house enquires in the area, sent witness appeal letters in a variety of languages to local holiday accommodations and questioned walkers using the Pennine Way.
Witness searches have also included investigations of every sighting of women matching her description in the Yorkshire Dales since 1 August 2004.
Enquiries are currently concentrating on missing persons records.