There is a later version of the tale – when isn’t there? This time Tristan is at the mercy of King Mark. He has been imprisoned and only by some daring athletic acrobatics - which sees Tristan jumping out of his window and on to some perilous rocks - does he escape with his life.
I have found this wonderful video on YouTube by Alan Lang, which shows your the magesty of Roche Rock. Take a look.
If nothing else Roche Rock is breathtakingly beautiful and who knows – maybe the young lovers did find refuge there.