Parent Lineage
Flattop Mountain: 6,660' MT 200' Rise
| Depth | Parent | Elevation | Prominence | State |
| 1 | Elkcalf Mountain | 7,607' | 707' | MT |
| 2 | 7620 | 7,620' | 440' | MT |
| 3 | Running Crane Mountain | 7,731' | 431' | MT |
| 4 | Bullshoe Mountain | 8,006' | 1,826' | MT |
| 5 | Goat Mountain | 8,191' | 2,217' | MT |
| 6 | Pondera County HP | 8,460' | 1,000' | MT |
| 7 | Field, Mount | 8,590' | 2,112' | MT |
| 8 | Patrick Gass, Mount | 8,620' | 1,120' | MT |
| 9 | Wright, Mount | 8,875' | 1,615' | MT |
| 10 | Old Baldy | 9,156' | 1,376' | MT |
| 11 | Rocky Mountain | 9,392' | 3,252' | MT |
| 12 | Red Mountain | 9,411' | 3,801' | MT |
| 13 | Red Mountain | 10,070' | 410' | MT |
| 14 | 10136 | 10,136' | 516' | MT |
| 15 | Table Mountain | 10,223' | 4,403' | MT |
| 16 | 10349 | 10,349' | 569' | MT |
| 17 | 10379 | 10,379' | 799' | MT |
| 18 | Evans, Mount | 10,641' | 2,061' | MT |
| 19 | West Goat Peak | 10,793' | 3,973' | MT |
| 20 | Torrey Mountain | 11,147' | 1,127' | MT |
| 21 | Tweedy Mountain | 11,154' | 3,814' | MT |
| 22 | "Huhs Horn" | 11,292' | 392' | ID |
| 23 | Scott Peak | 11,393' | 4,243' | ID |
| 24 | Bell Mountain | 11,612' | 1,752' | ID |
| 25 | Diamond Peak | 12,197' | 5,387' | ID |
| 26 | 12488 | 12,488' | 908' | WY |
| 27 | Peak Benchmark | 12,528' | 1,028' | WY |
| 28 | 12635 | 12,635' | 1,415' | WY |
| 29 | Francs Peak | 13,153' | 4,056' | WY |
| 30 | Downs Mountain | 13,349' | 1,569' | WY |
| 31 | Flagstone Peak | 13,450' | 830' | WY |
| 32 | Bastion Peak | 13,494' | 754' | WY |
| 33 | Gannett Peak | 13,804' | 7,076' | WY |
| 34 | Longs Peak | 14,255' | 2,940' | CO |
| 35 | Torreys Peak | 14,267' | 560' | CO |
| 36 | Grays Peak | 14,270' | 2,770' | CO |
| 37 | Lincoln, Mount | 14,286' | 3,862' | CO |
| 38 | Massive, Mount | 14,421' | 1,961' | CO |
| 39 | Elbert, Mount | 14,433' | 9,093' | CO |
| 40 | Whitney, Mount | 14,494' | 10,079' | CA |
Green = More Prominent Parent
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