Around here
Around Jefferson Slough
Temperature from a 1980 federal survey. The record says nothing about access, ownership or current conditions.
Data Source: Recreation.gov · Source: USGS GNIS · Thermal springs: NOAA NCEI (1980) · Public land: USGS PAD-US · Forest roads: USDA Forest Service MVUM · BLM routes and areas: Bureau of Land Management (simplified for web display)
About this river
Jefferson Slough is a 13.2 mile river. Streamflow is measured at the USGS gauge Jefferson River at Parsons Bdg nr Silver Star, MT (site 06027600). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2006 to 2025
Jefferson Slough typically runs highest in June, at a median 3,415 cfs, and lowest in August, at 197 cfs. The highest flow on record for any single day is 13,400 cfs, in 2011.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| April | 1,625 | 1,520 to 2,045 |
| May | 2,320 | 1,350 to 4,110 |
| June | 3,415 | 1,740 to 8,150 |
| July | 801 | 290 to 1,260 |
| August | 197 | 77 to 354 |
| September | 347 | 196 to 619 |
| October | 1,310 | 727 to 1,575 |
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 5 years of record. Statistics published by the US Geological Survey for Jefferson River at Parsons Bdg nr Silver Star, MT (site 06027600). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
3 mapped launches sit in the mapped area of Jefferson Slough, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Kountz BridgeJefferson RiverPublic
- Cardwell BridgeJefferson RiverPublic
- Mayflower BridgeJefferson RiverPublic
Made to print
Put Jefferson Slough 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 Jefferson Slough'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.
