About this river
Boise River is a 37.1 mile river near PaddleBoard Idaho in Idaho. Streamflow is measured at the USGS gauge Boise River near Twin Springs ID (site 13185000). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1911 to 2026
Boise River typically runs highest in May, at a median 3,440 cfs, and lowest in September, at 350 cfs. The highest flow on record for any single day is 15,400 cfs, in 1965.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 400 | 325 to 489 | |
| February | 440 | 365 to 567 | |
| March | 734 | 526 to 1,030 | |
| April | 2,035 | 1,285 to 2,845 | |
| May | 3,440 | 2,460 to 5,020 | |
| June | 3,000 | 2,030 to 4,275 | |
| July | 875 | 592 to 1,390 | |
| August | 410 | 335 to 544 | |
| September | 350 | 300 to 415 | |
| October | 366 | 320 to 434 | |
| November | 397 | 340 to 478 | |
| December | 390 | 321 to 494 |
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 115 years of record. Statistics published by the US Geological Survey for Boise River near Twin Springs ID (site 13185000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
4 mapped launches sit in the mapped area of Boise River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Spring ShoresBoise River - Lucky Peak ReservoirPublic
- Cinch CreekBoise River - Arrowrock ReservoirPublic
- Macks CreekBoise River - Lucky Peak ReservoirPublic
- Robie CreekBoise River - Lucky Peak ReservoirPublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show 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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