City of Rocks National Reserve is located in southern Idaho, known for its stunning rock formations and unique geological features. The area is popular among rock climbers and hikers, offering over 600 climbing routes and numerous trails that showcase the diverse landscape. Established in 1988, the reserve covers approximately 14,000 acres and is home to various wildlife species. The formations, made of granite, were shaped by volcanic activity and erosion, creating a picturesque environment for visitors. The reserve also has historical significance, as it was a landmark for pioneers traveling along the California Trail.