The Alna Line (Norwegian: Alnabanen) is a 4.3-kilometer (2.7 mi) railway line between Alnabru and Grefsen in Oslo, Norway. The single track line allows direct access between the Trunk Line and the Gjøvik Line, without having to pass via Oslo Central Station. The line is electrified and is owned by the Norwegian National Rail Administration. It is exclusively used by freight trains, and allows trains on the Bergen Line to reach Alnabru Freight Terminal.