Around here
Around Jocko River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Jocko River is a 33.4 mile river. Streamflow is measured at the USGS gauge South Fork Jocko River near Arlee MT (site 12381400). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1983 to 2025
Jocko River typically runs highest in June, at a median 195 cfs, and lowest in January, at 11 cfs. The highest flow on record for any single day is 1,060 cfs, in 1997.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 11 | 9.0 to 15 |
| February | 11 | 8.8 to 14 |
| March | 14 | 10 to 19 |
| April | 45 | 27 to 74 |
| May | 192 | 137 to 291 |
| June | 195 | 138 to 270 |
| July | 77 | 52 to 94 |
| August | 36 | 31 to 45 |
| September | 26 | 21 to 30 |
| October | 21 | 18 to 24 |
| November | 18 | 15 to 22 |
| December | 13 | 10 to 18 |
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 43 years of record. Statistics published by the US Geological Survey for South Fork Jocko River near Arlee MT (site 12381400). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
Put Jocko 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 Jocko 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.
