Founded in 1766 by Peter Hasenclever, the Long Pond Ironworks was operated by a succession of prominent ironmasters, including Robert Erskine, Martin J. Ryerson, and Abraham S. Hewitt. Its furnace, forge, and supporting village contributed to war efforts during the American Revolution, the War of 1812, and the Civil War. Like many other iron-producing sites in the Highlands, operations at Long Pond ended in the 1880s as the iron industry completed its westward migration. Long Pond was the colonial name for Greenwood Lake, which provided water power for the 18th- and 19th-century iron-smelting complex. The Long Pond Ironworks Historic District is listed on the State and National Registers of Historic Places.