Parent Lineage
George Peterson Butte: 4,780' WA 200' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | "Step Sister Peak" | 5,104' | 4,737' | 367' | WA |
| 2 | "Last Sister" | 5,562' | 5,260' | 302' | WA |
| 3 | "Barbara Peak" | 6,020' | 5,500' | 520' | WA |
| 4 | "Little Sister" | 6,620' | 6,100' | 520' | WA |
| 5 | South Twin | 6,936' | 3,448' | 3,488' | WA |
| 6 | Sherman Peak | 10,138' | 9,742' | 396' | WA |
| 7 | Baker, Mount | 10,778' | 1,936' | 8,842' | WA |
| 8 | Rainier, Mount | 14,405' | 1,174' | 13,231' | WA |
| 9 | Massive, Mount | 14,427' | 12,444' | 1,983' | CO |
| 10 | Elbert, Mount | 14,439' | 5,346' | 9,093' | CO |
| 11 | Whitney, Mount | 14,500' | 4,423' | 10,077' | CA |
Green = More Prominent Parent
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