A one-hour drive southeast of Ketchum, Craters of the Moon National Monument is an 83-sq-mile volcanic showcase. Lava flows and tubes and cinder cones are found along the 7-mile Crater Loop Rd , accessible by car or bicycle from April to November. In winter it's popular with skiers and snowshoers. Short trails lead from Crater Loop Rd to crater edges, onto cinder cones and into tunnels and lava caves. A surreal campground near the entrance station has running water only in summer.
