Around here
Around West Fork South Fork Sun River
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
West Fork South Fork Sun River is a 12.8 mile stream. Streamflow is measured at the USGS gauge South Fork Sun River near Augusta MT (site 06079000). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1911 to 2026
West Fork South Fork Sun River typically runs highest in June, at a median 1,180 cfs, and lowest in February, at 66 cfs. The highest flow on record for any single day is 5,510 cfs, in 2018.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 68 | 51 to 83 |
| February | 66 | 48 to 113 |
| March | 67 | 53 to 108 |
| April | 224 | 170 to 408 |
| May | 1,150 | 762 to 1,770 |
| June | 1,180 | 670 to 1,625 |
| July | 280 | 165 to 373 |
| August | 111 | 87 to 145 |
| September | 82 | 69 to 103 |
| October | 81 | 58 to 113 |
| November | 85 | 63 to 147 |
| December | 82 | 54 to 116 |
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 15 years of record. Statistics published by the US Geological Survey for South Fork Sun River near Augusta MT (site 06079000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show West Fork South Fork Sun 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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