City of Rocks National Reserve

Granite columns, some in excess of 60 stories tall, loom high above. Established in 1988, the Reserve encompasses 14,107 acres of land renowned for its scenic, geologic, and historical significance. Many of the granite rock formations that are the outstanding features of the Reserve are more than 2.5 billion years old, some of the oldest rocks found in North America. The rocks were shaped by weathering forces to form the fantastic shapes you see today.

City of Rocks is one of the finest technical rock-climbing sites anywhere. Over 500 climbing routes have been identified. Spires ranging 100 to 300 feet provide most of the climbing opportunities. Historical notes: During the Westward expansion, the City of Rocks area was an important landmark along the California Trail. Many pioneers left their names written in axle grease on the rocks adjacent to the trail. The Kelton-Boise stage route also traveled through the Reserve. Remains of the station site are still visible.

The park was placed on the National Register of Historic Places in 1987 and is cooperatively managed by the National Park Service and the Idaho Department of Parks and Recreation.