Missouri River in Montana
Around here
Around Missouri River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Missouri River is a 44.0 mile river. Streamflow is measured at the USGS gauge Missouri River at Fort Benton MT (site 06090800). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1891 to 2026
Missouri River typically runs highest in June, at a median 15,500 cfs, and lowest in September, at 4,700 cfs. The highest flow on record for any single day is 107,000 cfs, in 1908.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 4,870 | 4,000 to 6,060 |
| February | 5,020 | 4,170 to 6,370 |
| March | 5,760 | 4,760 to 7,180 |
| April | 7,250 | 5,315 to 9,565 |
| May | 11,700 | 7,750 to 16,600 |
| June | 15,500 | 9,095 to 23,850 |
| July | 6,940 | 4,910 to 9,920 |
| August | 4,940 | 3,880 to 6,040 |
| September | 4,700 | 3,810 to 5,665 |
| October | 4,970 | 4,100 to 5,990 |
| November | 5,260 | 4,345 to 6,205 |
| December | 5,000 | 4,100 to 6,000 |
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 135 years of record. Statistics published by the US Geological Survey for Missouri River at Fort Benton MT (site 06090800). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
2 mapped launches sit in the mapped area of Missouri River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Missouri River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
