Parent Lineage
O'Neil Peak: 3,041' WA 314' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | 3566 | 3,566' | 3,048' | 518' | WA |
| 2 | 4241 | 4,241' | 3,751' | 490' | WA |
| 3 | Elk Mountain | 4,538' | 3,180' | 1,358' | WA |
| 4 | 4598 | 4,598' | 3,500' | 1,098' | WA |
| 5 | Goat Mountain | 4,967' | 2,928' | 2,039' | WA |
| 6 | Saint Helens, Mount | 8,330' | 3,735' | 4,595' | WA |
| 7 | Adams, Mount | 12,278' | 4,145' | 8,133' | WA |
| 8 | Rainier, Mount | 14,405' | 1,148' | 13,257' | 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
Immediate Children:
| # | Child | Elevation | Prominence | State |
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