Katahdin Iron Works preserves the remains of a remote nineteenth-century Maine iron-making community that operated from 1845 to 1890 near the West Branch of the Pleasant River. Developed after iron deposits were found on Ore Mountain, it grew into a company town with a blast furnace, charcoal kilns, mills, and housing for about 200 families. Ownership changes, weak markets, wartime revival during the American Civil War, modernization efforts, a rail connection, and severe fire all shaped its history. Competition, exhausted timber for charcoal, and geographic disadvantages ended production. The site also includes Gulf Hagas and nearby The Hermitage, linking industrial history with notable natural scenery.