 Baltimore Pike was built as a turnpike in the early 19th century to connect Gettysburg, Littlestown, and Baltimore.The turnpike was a prominent linear feature during the 1863 Battle of Gettysburg despite not being the focus of a particular skirmish.Baltimore Pike was designated one of the original legislative routes in the early 1910s and became the northernmost part of US 140 in the late 1920s.