| Fortress Mountain | |
| Elevation Ft: | 12090 |
| Elevation Ref: | [1] |
| Prominence Ft: | 1643 |
| Location: | Park County, Wyoming U.S. |
| Range: | Absaroka Range, Shoshone National Forest |
| Map: | Wyoming#USA |
| Relief: | 1 |
| Coordinates: | 44.3369°N -109.7981°W |
| Coordinates Ref: | [2] |
| Topo: | USGS Sheep Mesa |
| Easiest Route: | Scramble |
Fortress Mountain (12090feet) is located in the Absaroka Range in the U.S. state of Wyoming.[3] Fortress Mountain is 1miles south of Sheep Mesa, a subpeak along the mesa that is 500feet lower in altitude. The headwaters of Cabin Creek are on the east slopes of Fortress Mountain, while those for Sheep Creek are on the northwest.