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 rail line carried coal and bricks (from the Lowca pit and Micklam brickworks) between 1913-1973, and the terraces in Lowca are old Coal Board houses - the ex-miners still have a fuel allowance, so in winter you will see a lot of smoking chimneys.
You will need to bring a pen or other writing implement with you.