History of the Ligonier Valley Rail Road. Preserved original station with period caboose. One of the better known short-line railroads, the Ligonier Valley Rail Road connected Ligonier Valley with the rest of the world via the Pennsylvania RR at Latrobe, Pennsylvania. It also connected the rest of the world with Pennsylvania's Mountain Playground, Ligonier Valley in general and Idlewild Park in particular. Originally only ten miles long, the line was extended six miles at the turn of the 20th century to service the coal fields north of Ligonier.