| Cairn Mountain | |
| Elevation Ft: | 12205 |
| Elevation Ref: | [1] |
| Prominence Ft: | 840 |
| Location: | Park County, Montana, U.S. |
| Map: | Montana#USA |
| Relief: | 1 |
| Coordinates: | 45.1464°N -109.8003°W |
| Coordinates Ref: | [2] |
| Topo: | USGS Granite Peak |
Cairn Mountain is in the Beartooth Mountains in the U.S. state of Montana.[3] The peak is in the Absaroka-Beartooth Wilderness in Custer National Forest. Cairn Mountain is 1.24miles south of Granite Peak, the tallest mountain in Montana.