About this river
South Branch Black River is a 12.9 mile river near SoHa Surf Shop LLC in Michigan. Streamflow is measured at the USGS gauge South Branch Black River near Bangor, MI (site 04102700). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1966 to 2026
South Branch Black River typically runs highest in March, at a median 138 cfs, and lowest in September, at 36 cfs. The highest flow on record for any single day is 2,070 cfs, in 2009.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 97 | 73 to 143 | |
| February | 95 | 75 to 147 | |
| March | 138 | 105 to 229 | |
| April | 123 | 91 to 187 | |
| May | 84 | 58 to 124 | |
| June | 58 | 40 to 93 | |
| July | 41 | 34 to 56 | |
| August | 37 | 31 to 47 | |
| September | 36 | 30 to 47 | |
| October | 47 | 38 to 71 | |
| November | 71 | 52 to 105 | |
| December | 96 | 73 to 146 |
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 60 years of record. Statistics published by the US Geological Survey for South Branch Black River near Bangor, MI (site 04102700). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
One mapped launch sits in the mapped area of South Branch Black River. Ramp data comes from the USGS national boat-ramp inventory.
- Saddle LakeSaddle LakePublic
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