| The first confirming marker for U.S. 15 north in Pennsylvania stands beyond the welcome sign in Freedom township. 06/04/05 |
| Acknowledging the Civil War and its role in Adams County, U.S. 15 is the Blue and Gray Highway. 06/04/05 |
| The first three of six Gettysburg exits from U.S. 15 north serves Gettysburg Military National Park. 06/04/05 |
| U.S. 15 Business (Emitsburg Road) parallels the east side of U.S. 15 north from the Maryland line to a diamond interchange with the freeway at Fairplay. 06/04/05 |
| Continuing north into Gettysburg National Military Park, U.S. 15 Business (Emitsburg Road) leads to Steinwehr Avenue in the borough of Gettysburg. 06/04/05 |
| U.S. 15 (Blue-Gray Highway) crosses Marsh Creek north into Cumberland township. 06/04/05 |
| PA 134 (Taneytown Road) crosses paths with U.S. 15 midway between Barlow and Round Top by Gettysburg Military National Park. 06/04/05 |
| U.S. 15 passes just east of Gettysburg Military National park at the diamond interchange with PA 134. Ensuing exits connect with Baltimore Pike (old PA 97) and PA 116. 06/04/05 |
| PA 134 (Taneytown Road) runs 7.5 miles north from the Maryland line in Mount Joy township to U.S. 15 Business (Steinwehr Avenue) in Gettysburg. 06/04/05 |
| Confirming marker posted northbound ahead of the Sachs Road overpass. 06/04/05 |
| U.S. 15 next meets the north end of PA 97 (Baltimore Pike) by Lake Heritage in northern Mount Joy township. 06/04/05 |
| Baltimore Pike (SR 2035) extends north along former PA 97/U.S. 140 to the Gettysburg National Military Park Visitors Center and U.S. 15 Business (Baltimore Street) south of Downtown Gettysburg. 06/04/05 |
| U.S. 15 continues 1.75 miles from the diamond interchange with PA 97 (Baltimore Pike) to the exit for PA 116 (Hanover Street). 06/04/05 |
| PA 97 forms a multi state route with MD 97 south from Littlestown to Reisterstown, Maryland. Prior to 1977 MSR 97 was a part of U.S. 140 between Gettysburg and Baltimore. 06/04/05 |
| U.S. 15 (Blue-Gray Highway) runs just west of the Lake Heritage community between PA 97 and PA 116. 06/05/05 |
| U.S. 30 and PA 116 converge west of their respective exits from U.S. 15 along York Street ahead of Downtown Gettysburg. 06/05/05 |
| PA 116 (Hanover Street) connects Gettysburg with the boroughs of Bonneauville, McSherrystown and Hanover to the east. 06/05/05 |
| A six-ramp parclo interchange joins U.S. 15 (Blue-Gray Highway) with U.S. 30 (Lincoln Highway) 1.5 miles beyond PA 116 (Hanover Street). 06/05/05 |