The 87-mile, 7-day walking route broadly follows the River Tamar, the historic boundary between Devon and Cornwall from sea to source, before continuing on to the North coast. It begins at Cremyll, overlooking Plymouth Sound and finishes at Marsland Mouth near Morwenstow. Linking the two coasts has also created a new 387-mile circular walking route around the border of Cornwall, Kylgh Kernow, Cornish for Circuit of Cornwall.