(Wo)man v Barge
Are you faster than a canal barge from Marsden to Diggle? You start at Tunnel End in Marsden, at the same time as the barge enters the tunnel, and finish in Diggle before the barge does. Simple. Standedge Tunnel is 3.25 miles long in a straight line through the hill; your route is 5 miles ish! up and over Marsden Moor.