| East Flattop Mountain | |
| Elevation Ft: | 8361 |
| Elevation Ref: | [1] |
| Prominence Ft: | 596 |
| Location: | Glacier County, Montana, U.S. |
| Map: | Montana#USA |
| Relief: | 1 |
| Range: | Lewis Range |
| Coordinates: | 48.7394°N -113.5211°W |
| Coordinates Ref: | [2] |
| Topo: | USGS Rising Sun, MT |
| First Ascent: | Unknown |
| Easiest Route: | Scramble |
East Flattop Mountain (8361feet) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana.[3] East Flattop Mountain rises to the north above Saint Mary Lake and is easily seen from the eastern entrance to the Going-to-the-Sun Road and the village of St. Mary, Montana.