When the West Highland Line was built across Rannoch Moor, its builders had to float the tracks on a mattress of tree roots, brushwood and thousands of tons of earth and ashes to prevent the heavy steel tracks sinking in the bog. Rannoch station opened to passengers on 7 August 1894. The station was laid out with a crossing loop and an island platform. There were sidings on both sides, and a turntable on the east side of the line. The siding on the east side has been removed. The station was host to a LNERcamping coach from 1937 to 1939. On 25 January 1987, the crossing loop was altered to right-hand running. The original Down platform has thus become the Up platform, and vice versa. The change was made in order to simplify shunting at this station, by removing the need to hand-pump the train-operated loop points to access the sidings. At the north end of the platform is a sculptured head, carved in stone by the navvies who built the line. It commemorates James Renton, a director of the West Highland Railway, who gave part of his personal fortune to save the line from bankruptcy during construction when the brushwood raft was continually sinking into Rannoch Moor.
Signalling
The signal box, which had 17 levers, was situated on the island platform. From the time of its opening in 1894, the West Highland Railway was worked throughout by the electric token system. In 1967, the method of working between and Rannoch was changed to the Scottish RegionTokenless Block system. In August 1985, the method of working between Crianlarich and Rannoch reverted to the electric token block system. The semaphore signals were removed on 3 November 1985 in preparation for the introduction of Radio Electronic Token Block. The RETB system was commissioned by British Rail between and Fort William Junction on 29 May 1988. This resulted in the closure of Rannoch signal box and others on that part of the line. The RETB is controlled from a Signalling Centre at Banavie railway station. The Train Protection & Warning System was installed in 2003. There was formerly another crossing point on Rannoch Moor, at Gorton Crossing near where the railway crossed the Rannoch Drove Road, and operationally dividing the long section between Bridge of Orchy and Rannoch stations. It remains today as an engineer's siding but devoid of the original buildings.
Services
Monday to Saturday, northbound, Rannoch has three services to Mallaig and one service to Fort William. Southbound, there are three services to Glasgow Queen Street and one service to London Euston. The sleeper also carries seated coaches and can therefore be used by regular passengers to/from Edinburgh Waverley and Glasgow Queen Street as it is booked to pick up/set down at both stations. On Sundays, there is just one service northbound to Mallaig all year, plus a second between May and late October; one service southbound to Glasgow Queen Street and one service to London Euston.