Whistlestop Valley, formerly the Kirklees Light Railway, is a visitor attraction featuring a 3+1⁄2-mile (5.6 km) long 15 in (381 mm) gauge minimum gauge railway. The attraction's main site is in the village of Clayton West in Kirklees, West Yorkshire, England which was first opened to the public on 19 October 1991, with a second, smaller site in a rural area near the village of Shelley.