The railway at Whistlestop Valley runs along the trackbed of the Lancashire & Yorkshire Railway's former branch line, from Clayton West via Skelmanthorpe to Shelley Woodhouse (a few yards close to the former Clayton West Junction[4] 1⁄2 mile (0.8 km), near Shepley) on the Penistone line from Huddersfield to Sheffield via Penistone and Barnsley.Coal was still transhipped from Emley Moor Colliery to Elland Power Station until 1984[11] and tracklifting of the branch was completed in 1986.Construction was aided significantly by the amount of redundant materials available from a number of collieries in the area which were slowly beginning to end their mining operations.[13] The line was originally 1 mile (1.6 km) in length running from Clayton West to a specially constructed halt called Cuckoos Nest.The journey gives fine views of the Grade II listed Emley Moor transmitting station, passes through the ancient woodland of Blacker Wood which is mentioned in the Domesday Book and includes a trip through the 511 yards (467 m) long Shelley Woodhouse Tunnel,[14] the longest tunnel on any 15 in (381 mm) gauge line in Britain.