Around here
Around Red Rock River
Data Source: Recreation.gov · Public land: USGS PAD-US
About this river
Red Rock River is a 48.5 mile river. Streamflow is measured at the USGS gauge Red Rock R bl Lima Reservoir nr Monida MT (site 06012500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1911 to 2026
Red Rock River typically runs highest in June, at a median 475 cfs, and lowest in February, at 19 cfs. The highest flow on record for any single day is 2,500 cfs, in 1933.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 22 | 14 to 27 |
| February | 19 | 12 to 25 |
| March | 20 | 11 to 24 |
| April | 23 | 8.3 to 66 |
| May | 288 | 148 to 408 |
| June | 475 | 379 to 585 |
| July | 301 | 211 to 390 |
| August | 237 | 78 to 300 |
| September | 95 | 23 to 232 |
| October | 32 | 16 to 84 |
| November | 23 | 14 to 57 |
| December | 23 | 15 to 30 |
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 100 years of record. Statistics published by the US Geological Survey for Red Rock R bl Lima Reservoir nr Monida MT (site 06012500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
Put Red Rock River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Red Rock 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.
