Geology
Roxy Ann Peak is a 30 million-year-old volcano situated in the Western Cascade Range. The bedrock in the area is composed mostly of granite and basalt. Much of the soil found on the slopes of Roxy Ann is dense, sticky clay; this composition often causes problems during building construction.
Over time, earthquakes and landslides have eroded away most of the top and much of the base area of the peak, leaving the familiar cone shape seen today. The peak stands 3,576 feet (1,090 m) above sea level with a topographic prominence of 753 feet (230 m), and rises 2,200 feet (670 m) above the surrounding Rogue Valley. The unique rounded top, location, and height of the peak create a landmark distinguishable from as far away as Shady Cove, 15.5 miles (24.9 km) to the north, and the Siskiyou Summit, 23.5 miles (37.8 km) to the south.
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