The Kelso Line was a ten-and-a-half-mile (16.9 km) long North British Railway built double track branch railway line in the Borders, Scotland, that ran from a junction south of St. Boswells on the Waverley Line to Kelso (the line ended at a temporary terminus at Wallace Nick until 1851) via three intermediate stations, Maxton, Rutherford and Roxburgh Junction where a branch line to Jedburgh joined the line.