2020 Map of Mastodon Mountain

About this map

The St. Joe River carves through the southern edge of this Idaho mountain landscape, designated here as the Saint Joe Wild and Scenic River. Small settlements such as Hoyt and Ethelton cling to the narrow river valley, which serves as a primary transit corridor via the St Joe River Rd. This area within the St. Joe National Forest is defined by its high summits and deep drainages, including Mastodon Mtn, Dunn Peak, and Prince Peak. The modern era has introduced specialized access for backcountry exploration, evidenced by numerous designated off-highway vehicle routes like Dunn Peak Ohv and Lower Dennis Ohv. These trails often follow older service paths to landmarks such as the Dunn Peak Lookout Ohv, while names like Daisy Gulch, Horn Gulch, and Ally Point speak to the long history of land navigation in Shoshone County.