<Tr> <Th> Designated NNL </Th> <Td> 1971 </Td> </Tr> <P> Enchanted Rock (16710 Ranch Rd 965, Fredericksburg TX) is a pink granite mountain located in the Llano Uplift approximately 17 miles (27 km) north of Fredericksburg, Texas and 24 miles (39 km) south of Llano, Texas, United States . Enchanted Rock State Natural Area, which includes Enchanted Rock and surrounding land, spans the border between Gillespie County and Llano County, south of the Llano River . Enchanted Rock covers approximately 640 acres (260 ha) and rises approximately 425 feet (130 m) above the surrounding terrain to elevation of 1,825 feet (556 m) above sea level . It is the largest pink granite monadnock in the United States . Enchanted Rock State Natural Area, a part of the Texas state park system, includes 1,644 acres (665 ha). Designated a Recorded Texas Historic Landmark in 1936 . </P> <P> Enchanted Rock was rated in 2017 as the best campsite in Texas in a 50 - state survey conducted by Msn.com . </P> <P> The prominent granite dome is visible for many miles in the surrounding basin of the Llano Uplift . The weathered dome, standing above the surrounding plain is known to geologists as a monadnock . The rock is actually the visible above - ground part of a segmented ridge, the surface expression of a large igneous batholith, called the Town Mountain Granite of middle Precambrian (1,082 ± 6 million years ago) material that intruded into earlier metamorphic schist, called the Packsaddle Schist . The intrusive granite of the rock mass, or pluton, was exposed by extensive erosion of the surrounding sedimentary rock, primarily the Cretaceous Edwards limestone, which is exposed a few miles to the south of Enchanted Rock . </P>

How far is enchanted rock from san antonio texas