The South Mountain Railroad was a southcentral Pennsylvania railway line for "connecting the Pine Grove works to the Cumberland Valley R. R."[3] and which provided mining and passenger services via a southwest section from Hunter's Run, Pennsylvania, and a northern section from Hunter's Run to the CVRR junction northeast of Carlisle.
[9]: 2 By June 2, 1874, the railroad had 8 scheduled stops between the terminus and South Mountain Junction;[10] and in December 1875, the railway had sidings of 2.26 mi (3.64 km); 9 passenger, 6 freight, & 3 wood/water stations; and 2 engine houses.
[13] Instead on August 20, 1883; the Gettysburg and Harrisburg Railroad (with the same president, Colonel Jackson C. Fuller) commenced a junction at Hunter's Run for a line to the battlefield.
[14] The tracks to Pine Grove Park were used by the first G&H excursion train from Gettysburg on May 28, 1884;[14] and the stop at Laurel Forge was added to the G & H's July 3, 1884, schedule.
[17] The lease was terminated on November 11, 1910 and the Reading Company took up operation of the line from Hunters Run to Pine Grove Furnace.