Quartz Mountain is a located 35 miles (56 km) east of Roseburg in Douglas County, Oregon, United States.[1][3] Located within the Jackson Creek subbasin, a tributary of the South Umpqua River, Quartz Mountain rises to an elevation of 5,200 feet (1,585 m) in the Umpqua National Forest. It has a large deposit of high-purity silica.[4]