The Northallerton to Eaglescliffe Line runs between the towns of Northallerton and Eaglescliffe. It connects the East Coast Main Line to the Tees Valley Line. It was built by the Leeds Northern Railway as part of their main line from Leeds to Stockton (via Harrogate and Ripon) which opened on 2 June 1852, although the connection to the ECML at the Northallerton end was not opened for a further four years.
A number of old stations that used to serve towns and villages on the line were closed between 1954 and the end of local passenger services over the route in September 1965, with those at Picton and Yarm being the last to go, although that at Yarm has since reopened.