The City of Rocks Visitor Center is located in Almo. The road via Oakley is closed during winter months. Geology Some of the gr anitic rock formations here are 2.5 billion years old. They are some of the oldest formations found in the continental United States. The fantastic rocks are shaped by weathering.
Many people see animals, faces, or buildings in the rocks.
What you see is limited only by your imagination. About 700 routes have been described to date. Privately published climbing guides, available for sale at Reserve headquarters, are the best source of information for the serious climber. Check at headquarters for climbing restrictions. The City of Rocks area was an important landmark on the California Trail.