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Long Caves in the State of Montana |
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| Rank | Cave Name | Length (ft) | Depth (ft) | County |
| 1 | Bighorn Caverns | 77167 | 171 | Big Horn |
| 2 | Silvertip Cave System | 30702 | 1089 | Flathead |
| 3 | Scapegoat Cave System | 20343 | ? | Lewis and Clark |
| 4 | Blood Cave | 14328 | 333 | Flathead |
| 5 | Lewis and Clark Cavern | 10063 | 580 | Jefferson |
| 6 | French Creek Cave | 9669 | 434 | Beaverhead |
| 7 | Poia Lake Cave | 5480 | 365 | Glacier |
| 8 | Virgil the Turtle's Greathouse Cave | 5394 | 1586 | Flathead |
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Other Significant Long Caves in the State of Montana |
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| Rank | Cave Name | Length (ft) | Depth (ft) | County |
| 8 | Sunray-Sunset Cave System | 4928 | 801 | Flathead |
| 9 | Ram's Horn Cave | 4750 | 493 | Meagher |
| 10 | Flakey Cave | 4503 | 279 | Flathead |
| 11 | Mill Creek Crystal Cave | 4000 | 300 | Park |
| 12 | Lick Creek Cave | 4000 | 240 | Cascade |
| 13 | Meanderbelt Cave | 3959 | 633 | Flathead |
| 14 | New Year Crystal Cave | 3602 | 134 | Fergus |
| 15 | Little Ice Cave | 3500 | 102 | Carbon |