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Bitterroot River
| States | Montana |
| Length | 85.5 miles |
| Watershed Length* | 598 miles |
| Mouth | Clark Fork ⤏ Eastern Pacific Ocean |
| GNIS | 779961 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Big Creek | 40 | 18 | 18 |
| Bitterroot River - East Fork | 86 | 45 | 62 |
| Bitterroot River - West Fork | 86 | 45 | 120 |
| Fred Burr Creek | 43 | 24 | 42 |
| Kootenai Creek | 35 | 14 | 14 |
| Lolo Creek | 14 | 32 | 47 |
| Lost Horse Creek | 71 | 21 | 21 |
| Miller Creek | 9 | 18 | 18 |
| Roaring Lion Creek | 62 | 15 | 15 |
| Rock Creek | 75 | 21 | 21 |
| Rye Creek | 85 | 18 | 18 |
| Skalkaho Creek | 61 | 26 | 26 |
| Sleeping Child Creek | 67 | 25 | 25 |
| Threemile Creek | 28 | 18 | 18 |
| Tin Cup Creek | 80 | 17 | 17 |
| Willoughby Creek | 38 | 15 | 15 |
| Willow Creek | 51 | 17 | 17 |
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey