Schooley's Mountain, officially Schooleys Mountain, is a long ridge in northern New Jersey extending about 20 miles through the southern Highlands between the Kittatinny Valley and the Piedmont plateau. Named for Quaker landowners in the 1790s, it later became a 19th-century summer retreat known for mountain air and chalybeate springs, and a state tuberculosis sanatorium was established near Mount Kipp. The ridge also supported small iron mining and granite quarrying. Its rough terrain long complicated travel, with Schooley's Mountain Road serving as the main crossing and noted by George Washington as hazardous. Today, farms, housing, woods, waterfalls, parkland, and trails share the ridge.