About City of Rocks National Reserve
Gardens And Parks, Urban Environment, Cultural, Interesting Places, Natural, Nature Reserves Others, Nature Reserves, National Parks
The City of Rocks National Reserve, also known as the Silent City of Rocks, is a United States National Reserve and state park lying 2 miles (3.2 km) north of the south central Idaho border with Utah. It is widely known for its excellent rock climbing and rock formations.
The rock spires in the City of Rocks and adjacent Castle Rocks State Park are largely composed of granitic rock of the Oligocene Almo pluton and Archean Green Creek Complex.