Quartz Mountain (Douglas County, Oregon)
Quartz Mountain is a located  east of Roseburg in Douglas County, Oregon, United States. Located within the Jackson Creek subbasin, a tributary of the South Umpqua River, Quartz Mountain rises to an elevation of  in the Umpqua National Forest. It has a large deposit of high-purity silica. The summit was the site of a Forest Service lookout tower until it was removed in 1970. References

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Mountains of Douglas County, Oregon
Mountains of Oregon
Umpqua National Forest