The tourist, 24, went missing around after going to take photographs in an area known as the Pilgrims Path.
The young woman had been camping in the area with her partner and had arranged to meet at a local car park in Bunglass.
However when she failed to turn up as darkness fell, the young man alerted the Donegal Mountain Rescue Services around 9pm.
Other rescue personnel including the Sligo Mountain Rescue team and the Killybegs Coastguard also joined in the search.
The young woman was eventually found by the Killybegs Coastguard around 12.30am and very wet, cold and disorientated after wrapping herself in her sleeping bag.
Brian Murray of the Donegal Mountain Rescue said the woman was very lucky indeed.
“There was no mobile phone signal in the area and she was lucky that the coastguard service managed to see the light from her phone.
“She was very cold and wet and she was also carrying a slight ankle injury which she had picked up.
“She had been heading for the lights of Teelin and just became disorientated. She had no torch with her and was completely in the dark.
“It was a very wert night although it was mild and thankfully the Killybegs Castguard managed to spot the light from her phone,” he said.
The woman and her partner were reunited and, after being treated by members of the 40 strong rescue personnel, did not require any hospital treatment.