About this river
Ruby River is a 36.4 mile river near Camp Creek Outfitters in Montana. Streamflow is measured at the USGS gauge Ruby River below reservoir near Alder, MT (site 06020600). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1963 to 2025
Ruby River typically runs highest in June, at a median 464 cfs, and lowest in February, at 43 cfs. The highest flow on record for any single day is 2,500 cfs, in 1984.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 44 | 31 to 58 | |
| February | 43 | 32 to 56 | |
| March | 44 | 33 to 61 | |
| April | 57 | 40 to 116 | |
| May | 404 | 259 to 555 | |
| June | 464 | 350 to 721 | |
| July | 321 | 282 to 376 | |
| August | 334 | 297 to 386 | |
| September | 240 | 208 to 281 | |
| October | 77 | 55 to 128 | |
| November | 61 | 44 to 82 | |
| December | 45 | 33 to 66 |
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 63 years of record. Statistics published by the US Geological Survey for Ruby River below reservoir near Alder, MT (site 06020600). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Ruby River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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