Parent Lineage
Fortress Mountain: 8,684' WA 1,654' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | Seven Fingered Jack | 9,080' | 8,695' | 385' | WA |
| 2 | Fernow, Mount | 9,246' | 6,437' | 2,809' | WA |
| 3 | Bonanza Peak | 9,507' | 5,782' | 3,725' | WA |
| 4 | Glacier Peak | 10,549' | 3,009' | 7,540' | WA |
| 5 | Little Tahoma Peak | 11,141' | 10,302' | 839' | WA |
| 6 | Rainier, Mount | 14,412' | 1,148' | 13,264' | WA |
| 7 | Massive, Mount | 14,427' | 12,444' | 1,983' | CO |
| 8 | Elbert, Mount | 14,438' | 5,346' | 9,092' | CO |
| 9 | Whitney, Mount | 14,494' | 4,415' | 10,079' | CA |
Green = More Prominent Parent
Immediate Children:
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