Winter fog blankets the valleys of the Jim Sage Mountains at City of Rocks National Reserve in Idaho. Travelers on the California Trail described the rocks here in vivid detail as “a city of tall spires,” “steeple rocks” and “the silent city.” Today, this backcountry byway attracts rock climbers, campers, hikers and hunters. Enjoy inspirational scenery, exceptional opportunities for geologic study and interesting stories of the people who lived and traveled through this beautiful land. Photo by National Park Service.