Iron Mountain, Mountain summit in Camas County, United States.

Iron Mountain is a 9,694-foot (2,955 m) peak at the west end of the Soldier Mountains in the Sawtooth National Forest, northwest of Fairfield in Camas County, Idaho. Its northern slopes drain into Deadwood Creek, a tributary of the South Fork Boise River, with Heart Lake just north-northeast and Upper Deadwood Lake to the southeast.

A fire lookout tower once stood at the summit, now marked only by concrete foundations visible at the top. These ruins are remnants of early forest management efforts in the region.

The mountain serves as a natural boundary between the developed Camas Prairie region and the remote wilderness of the Sawtooth National Forest.

Plan to drive several hours from Boise to reach the trailhead at Bighorn Campground. The journey out and back is demanding, so starting early and checking weather conditions beforehand are essential for a safe visit.

The summit holds an old Forest Service fire lookout, and the main trail up is 11 miles (18 km) one way, open to two-wheel off-road vehicles. Deadwood Creek drains the northern slopes toward the South Fork Boise River, and Upper Deadwood Lake lies southeast of the peak.