Porphyry Mountain is a summit located in Madison County, Montana. It appears on the Ramshorn Mountain USGS 7.5-minute topographic quadrangle. The nearest populated place is Brandon, approximately 9.6 miles to the W.
Madison County · Montana
Porphyry Mountain is a summit located in Madison County, Montana. It appears on the Ramshorn Mountain USGS 7.5-minute topographic quadrangle. The nearest populated place is Brandon, approximately 9.6 miles to the W.