Parent Lineage
North Twin: 12,237' AB 3,412' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | Columbia, Mount | 12,273' | 4,494' | 7,779' | AB, BC |
| 2 | 12481 | 12,481' | 11,607' | 874' | WY |
| 3 | Peak Benchmark | 12,530' | 11,514' | 1,016' | WY |
| 4 | 12645 | 12,645' | 11,207' | 1,438' | WY |
| 5 | Francs Peak | 13,161' | 9,102' | 4,059' | WY |
| 6 | Downs Mountain | 13,356' | 11,778' | 1,578' | WY |
| 7 | Flagstone Peak | 13,445' | 12,619' | 826' | WY |
| 8 | Bastion Peak | 13,490' | 12,735' | 755' | WY |
| 9 | Gannett Peak | 13,811' | 6,732' | 7,079' | WY |
| 10 | Longs Peak | 14,259' | 11,312' | 2,947' | CO |
| 11 | Torreys Peak | 14,272' | 13,723' | 549' | CO |
| 12 | Grays Peak | 14,275' | 11,493' | 2,782' | CO |
| 13 | Lincoln, Mount | 14,293' | 10,433' | 3,860' | CO |
| 14 | Massive, Mount | 14,427' | 12,444' | 1,983' | CO |
| 15 | Elbert, Mount | 14,438' | 5,346' | 9,092' | CO |
| 16 | Whitney, Mount | 14,494' | 4,415' | 10,079' | CA |
Green = More Prominent Parent
Immediate Children:
| # | Child | Elevation | Prominence | State |
| 1 | Alberta, Mount | 11,876' | 2,625' | AB |
| 2 | Twins Tower | 11,876' | 394' | AB |
| 3 | Forbes, Mount | 11,866' | 5,338' | AB |
| 4 | South Twin | 11,745' | 1,050' | AB |
| 5 | Brazeau, Mount | 11,564' | 4,839' | AB |
| 6 | Snow Dome | 11,515' | 984' | AB, BC |
| 7 | Stutfield Peak | 11,351' | 918' | AB |
| 8 | 11351 | 11,351' | 656' | AB |
| 9 | 10958 | 10,958' | 263' | AB |
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