Parent Lineage
Flattop Mountain: 12,127' CO 591' Rise
| Depth | Parent | Elevation | Saddle | Prominence | State |
| 1 | Zirkel, Mount | 12,187' | 8,708' | 3,479' | CO |
| 2 | Parkview Mountain | 12,303' | 9,636' | 2,667' | CO |
| 3 | Cascade Mountain | 12,326' | 11,483' | 843' | CO |
| 4 | Bowen Mountain | 12,530' | 11,260' | 1,270' | CO |
| 5 | Nimbus, Mount | 12,721' | 12,098' | 623' | CO |
| 6 | Cumulus, Mount | 12,729' | 12,329' | 400' | CO |
| 7 | Howard Mountain | 12,826' | 11,955' | 871' | CO |
| 8 | Richthofen, Mount | 12,944' | 10,273' | 2,671' | CO |
| 9 | Clark Peak | 12,955' | 10,180' | 2,775' | CO |
| 10 | Taylor Peak | 13,157' | 12,741' | 416' | CO |
| 11 | Powell Peak | 13,195' | 12,892' | 303' | CO |
| 12 | McHenrys Peak | 13,330' | 12,446' | 884' | CO |
| 13 | Chiefs Head Peak | 13,577' | 12,881' | 696' | CO |
| 14 | Longs Peak | 14,259' | 11,312' | 2,947' | CO |
| 15 | Torreys Peak | 14,272' | 13,723' | 549' | CO |
| 16 | Grays Peak | 14,275' | 11,493' | 2,782' | CO |
| 17 | Lincoln, Mount | 14,293' | 10,433' | 3,860' | CO |
| 18 | Massive, Mount | 14,427' | 12,444' | 1,983' | CO |
| 19 | Elbert, Mount | 14,439' | 5,346' | 9,093' | CO |
| 20 | Whitney, Mount | 14,500' | 4,423' | 10,077' | CA |
Green = More Prominent Parent
Immediate Children:
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