| Flatiron Mountain | |
| Elevation Ft: | 11019 |
| Prominence Ft: | 499 |
| Parent Peak: | Big Creek Peak |
| Location: | Lemhi County, Idaho, U.S. |
| Range: | Lemhi Range |
| Map: | USA Idaho |
| Map Width: | 240 |
| Coordinates: | 44.461°N -113.5261°W |
| Topo: | USGS Big Creek Peak |
| Easiest Route: | Scramble, |
Flatiron Mountain, at 11109feet above sea level is a peak in the Lemhi Range of Idaho. The peak is located in Lemhi County on the border of Caribou-Targhee National Forest and Salmon-Challis National Forest. It is about 1.1miles southeast of Big Creek Peak.[1]