Parent Lineage
"Tahtlum Peak": 6,567' WA 1,135' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | "Chinook Peak" | 6,904' | 6,380' | 524' | WA |
| 2 | Crystal Mountain | 7,007' | 4,692' | 2,315' | WA |
| 3 | Cowlitz Chimneys, North | 7,015' | 6,620' | 395' | WA |
| 4 | Cowlitz Chimneys, Middle | 7,421' | 7,100' | 321' | WA |
| 5 | Cowlitz Chimneys, South | 7,605' | 6,620' | 985' | WA |
| 6 | Little Tahoma Peak | 11,141' | 10,302' | 839' | WA |
| 7 | Rainier, Mount | 14,412' | 1,148' | 13,264' | WA |
| 8 | Massive, Mount | 14,427' | 12,444' | 1,983' | CO |
| 9 | Elbert, Mount | 14,438' | 5,346' | 9,092' | CO |
| 10 | Whitney, Mount | 14,494' | 4,415' | 10,079' | CA |
Green = More Prominent Parent
Immediate Children:
| # | Child | Elevation | Prominence | State |
| 1 | Naches Peak | 6,452' | 712' | WA |
| 2 | 6271 | 6,271' | 331' | WA |
| 3 | 6085 | 6,085' | 465' | WA |
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