The Horten Line (Norwegian: Hortenlinjen) was a 7.0-kilometer (4.3 mi) branch railway line of the Vestfold Line which ran from Skoppum to Horten, Norway. The line opened as a narrow gauge line on 13 October 1881, the same day as the Vestfold Line. The latter had been proposed to run through Horten, but instead a branch line was chosen. The Horten Line converted to standard gauge in 1949 and electrified in 1957. Passenger transport ran until 1968 and freight trains until 2002. The line was demolished in 2009. Skoppum Station and have both been preserved as examples of Balthazar Lange's Swiss chalet style architecture.