Walk the Line is a series of caches linking Lowca and High Harrington along the cycleway, which follows the route of the old railway. Locals describe the walk/cycle as "goin' down t'line'. The route is tarmaced and suitable for walking, cycling, horses and pushchairs. It is a bit narrow in places, and can get busy at weekends, especially in good weather.
The railway line originally carried coal and bricks (from Lowca pit and the Micklam brick works) until the 1970's.