| Ernest Peak | |
| Elevation M: | 3498 |
| Elevation Ref: | [1] |
| Elevation Ref: | [2] --> |
| Prominence M: | 1078 |
| Prominence Ref: | [3] |
| Range: | Park Ranges |
| Parent Peak: | Mount Forbes (3617 m) |
| Region Type: | Provinces |
| Part Type: | Protected area |
| Part: | Banff National Park |
| Map: | Canada Alberta#Canada British Columbia |
| Map Size: | 200 |
| Label Position: | right#left |
| Coordinates: | 51.9572°N -117.105°W |
| Coordinates Ref: | [4] |
| First Ascent: | 1926 by A.J. Ostheimer, M.M. Strumia, J.M. Thorington, E. Feuz |
Ernest Peak - Lyell 3, L3 or Mt. Lyell (on maps, etc.) - is the central and highest peak of five distinct subpeaks on Mount Lyell (Canada) and is located on the border of Alberta and British Columbia. (There has been some dispute whether Lyell 2 or Lyell 3 is highest, but according to the recently released and corrected Climbers Guide to The Canadian Rocky Mountains - Rockies West book, the tallest is Ernest Peak). It was named in 1972 by Sydney R. Vallance after Ernest Feuz Jr.[5]
Due to this peak being the central and tallest subpeak - and thus is "Mount Lyell" - see the Mount Lyell article for geology and climate.