Generally, the National Road in Pennsylvania is aligned with U.S. Route 40 through the southwestern corner of the state from the West Virginia border and the town of West Alexander, Washington County, at the western end to Addison, Somerset County, and the Maryland border at the eastern extent. Access to Route 40 along the Road's 90 miles can be found on any Pennsylvania road map.

Once on Route 40 travelers will notice the "Historic National Road" signs pictured here. These signs delineate the original alignment of the Road, which does not always correspond to the Route 40 alignment. Also, notable along the National Road are the obelisk mile markers, originally installed in 1835, which are positioned at one-mile intervals. The mile markers denote the distances to Cumberland, MD, and Wheeling, WV, as well as to the nearest town. All 90 of these mile markers have been restored or replaced. They act as confirmation that the visitor is on the Historic National Road.

The map below shows some of the Road's favorite visitor sites. By clicking on a site, you will be linked to the web page which provides a description and picture(s) of the area. Please note: Our web pages are categorized by the type of landmark, building, or other significant features. Your destination may be mixed geographically with other similar destinations.