Clarks Fork Yellowstone River near Yellowstone R&R River Rentals
About this river
Clarks Fork Yellowstone River is a 4.6 mile river near Yellowstone R&R River Rentals in Montana. Streamflow is measured at the USGS gauge Clarks Fork Yellowstone River at Edgar MT (site 06208500). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1921 to 2026
Clarks Fork Yellowstone River typically runs highest in June, at a median 3,725 cfs, and lowest in September, at 399 cfs. The highest flow on record for any single day is 18,100 cfs, in 2022.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| April | 485 | 362 to 624 | |
| May | 1,670 | 1,000 to 2,870 | |
| June | 3,725 | 2,765 to 5,400 | |
| July | 1,660 | 980 to 2,620 | |
| August | 444 | 266 to 676 | |
| September | 399 | 268 to 555 | |
| October | 538 | 421 to 657 | |
| November | 520 | 442 to 589 | |
| December | 420 | 350 to 490 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 87 years of record. Statistics published by the US Geological Survey for Clarks Fork Yellowstone River at Edgar MT (site 06208500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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