About this river
South Fork Boise River is a 19.8 mile river near PaddleBoard Idaho in Idaho. Streamflow is measured at the USGS gauge SF Boise River at Neal Bridge near Arrowrock Dam ID (site 13192200). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2011 to 2019
South Fork Boise River typically runs highest in May, at a median 2,810 cfs, and lowest in October, at 355 cfs. The highest flow on record for any single day is 8,820 cfs, in 2017.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 371 | 356 to 404 | |
| February | 411 | 374 to 538 | |
| March | 505 | 419 to 1,070 | |
| April | 1,015 | 714 to 1,970 | |
| May | 2,810 | 1,170 to 3,930 | |
| June | 1,885 | 1,645 to 2,775 | |
| July | 1,760 | 1,620 to 1,830 | |
| August | 1,670 | 1,420 to 1,800 | |
| September | 639 | 505 to 699 | |
| October | 355 | 335 to 370 | |
| November | 355 | 336 to 381 | |
| December | 365 | 347 to 388 |
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 8 years of record. Statistics published by the US Geological Survey for SF Boise River at Neal Bridge near Arrowrock Dam ID (site 13192200). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show South Fork Boise 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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