People in Gundagai were pressing for a railway line even before the railway had reached Cootamundra in 1877. A fire at the Grand Palace, Sydney in 1882 caused a delay as the building which temporarily housed all the plans, reference material and other document were lost and a new survey had to be carried out. In 1883 a 25ft map for a line from Cootamundra to Gundagai was produced showing the route, was posted at the court house in Gundagai. The start of construction is not recorded but articles appeared in newspapers at the end of that year showing work in progress. Controversy arose in mid 1884 over the site of the station in Gundagai before the existing site was decided. The Government took over the line to Gundagai on 1 June 1886 the cost was $540,000, the contractors trains were operating for some time before that date taking passengers, goods and mail. The fares on opening day for Gundagai to Cootamundra were 1st class 6/6 (65 cents) 2nd class 4/3 (42 cents). A report was produced, in 1884, for provision of a line from Gundagai to Tumut at an estimated cost of $774534. It was some 13 years later in 1899 that the extension to Tumut came before the Government, though survey work had been completed at the end of 1884 for an estimated cost of near $800,000. Mt Horeb was opened on 12 October 1903 Gillmore was opened on the 2 December 1903 as Killarney but changed to Gilmore Siding in January 1904. Tumut was opened on 12 October 1903. Comprising a platform, goods shed of 60 ft X 17 ft, loading bank and engine shed, coal stage, water tank and a 50 foot turntable. Cattle and sheep races were also added. Sidings were for BP (COR), Tumut Co-op Dairy Co. and the Freezing Works.
The Batlow line opened on 10 May 1922. Until the end of steam, train services were handled by a single class of locomotive, the 1877 vintage 19 class 0-6-0, specially fitted with ex Baldwin bogie tenders to enable the use of the 50ft turntables. The trains were really short, limited to 100 tons by steep 1 in 25 gradients and sharp curves. Prior to the end of steam in the 1960s, services ran four times weekly as mixed or goods trains with passengers generally carried in an HS composite van or occasionally a PHG guards van. Services between Cootamundra and Tumut saw a variety of other smaller locomotives including 12 class 4-4-0s on passenger services and 25 class 2-6-0s on freight workings. By the 1950s these locomotives were usurped by C30T 4-6-0s fitted with 6 wheel tenders to enable them to be turned on the 50 diameter turntable at Tumut. Passenger services were supplemented with 600/700 class railcars and CPH railmotors.
All services were withdrawn on 16-1-1984 after storms had washed away a number of sections of track