The South Mountain Iron Company was the owner of the Pine Grove Furnace

Pine Grove Iron Works

The Pine Grove Iron Works was a southcentral Pennsylvania smelting facility during the Industrial Revolution. The works is notable for remaining structures that are historical visitor attractions of Pine Grove Furnace State Park, including the furnace stack of the Pine Grove Furnace.-Geography:The...

 in Cumberland County, Pennsylvania

Cumberland County, Pennsylvania

Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...

, along South Mountain

South Mountain (Maryland and Pennsylvania)

South Mountain is the northern extension of the Blue Ridge Mountain range in Maryland and Pennsylvania. From the Potomac River near Knoxville, Maryland in the south, to Dillsburg, Pennsylvania in the north, the long range separates the Hagerstown and Cumberland valleys from the Piedmont regions of...

 after the 1864 $1,500,000 purchase from Jay Cooke & Company

Jay Cooke & Company

Jay Cooke & Company was a U.S. bank from 1861 to 1873. It was the first brokerage house to use telegraph messages to confirm with clients the purchase and sale of securities. Headquartered in Philadelphia, Pennsylvania, it had branches in New York City and Washington, DC...

. In 1877 the company was split into separate mining and railway companies, with the latter South Mountain Railway and Mining Company establishing the 1884 South Mountain Railroad

South Mountain Railroad (Cumberland)

The South Mountain Railroad was a southcentral Pennsylvania railway line for "connecting the Pine Grove works to the Cumberland Valley R. R." 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...

 between the Pine Grove Iron Works

Pine Grove Iron Works

The Pine Grove Iron Works was a southcentral Pennsylvania smelting facility during the Industrial Revolution. The works is notable for remaining structures that are historical visitor attractions of Pine Grove Furnace State Park, including the furnace stack of the Pine Grove Furnace.-Geography:The...

 and the Cumberland Valley Railroad

Cumberland Valley Railroad

The Cumberland Valley Railroad was an early railroad in Pennsylvania, USA, originally chartered in 1831 to connect with Pennsylvania’s Main Line of Public Works...

's Carlisle Junction then being purchased by the 1891 Gettysburg and Harrisburg Railway

Gettysburg and Harrisburg Railway

The Gettysburg and Harrisburg Railway was a Pennsylvania line from near Carlisle southward to Gettysburg operated by a of the Reading Company...

 company. The real estate of the 1877 South Mountain Mining and Iron Company is now the Pine Grove Furnace State Park

Pine Grove Furnace State Park

Pine Grove Furnace State Park is a protected Pennsylvania area that includes Laurel and Fuller lakes in Cooke Township. The park provides various outdoor recreation activities, has the remains of the Pine Grove Iron Works, and was the site of the 1830 Laurel Forge, 1880s Pine Grove Park, and an...

 and Michaux State Forest

Michaux State Forest

Michaux State Forest is a Pennsylvania State Forest in Pennsylvania Bureau of Forestry District #1. The main offices are located in Fayetteville in Franklin County, Pennsylvania in the United States....

after being sold to the Pennsylvania Department of Forestry in 1912-3.