Boise River at Caldwell, ID
USGS Site No: 13211205 • Boise River • Canyon County, ID
Boise River at Caldwell, ID on the Boise River is currently at 1,640 cfs (Very High — 95th percentile for this date) . Gage height: 8.25 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 518 | |
| 25th | Low threshold | 571 | |
| 50th (Median) | Normal (median) | 580 | |
| 75th | High threshold | 609 | |
| 95th | Very High threshold | 0 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 1,690 | — |
| May 27, 2026 | 1,550 | — |
| May 26, 2026 | 1,480 | — |
| May 25, 2026 | 1,420 | — |
| May 24, 2026 | 1,440 | — |
| May 23, 2026 | 1,410 | — |
| May 22, 2026 | 1,420 | — |
| May 21, 2026 | 1,410 | — |
| May 20, 2026 | 1,430 | — |
| May 19, 2026 | 1,470 | — |
| May 18, 2026 | 1,510 | — |
| May 17, 2026 | 1,480 | — |
| May 16, 2026 | 1,430 | — |
| May 15, 2026 | 1,220 | — |
| Apr 20, 2026 | 2,050 | — |
| Apr 19, 2026 | 2,070 | — |
| Apr 18, 2026 | 2,070 | — |
| Apr 17, 2026 | 1,720 | — |
| Apr 16, 2026 | 1,310 | — |
| Apr 15, 2026 | 660 | — |
| Apr 14, 2026 | 870 | — |
| Apr 13, 2026 | 781 | — |
| Apr 12, 2026 | 313 | — |
| Apr 11, 2026 | 260 | — |
| Apr 10, 2026 | 198 | — |
| Apr 9, 2026 | 199 | — |
| Apr 8, 2026 | 264 | — |
| Apr 7, 2026 | 326 | — |
| Apr 6, 2026 | 303 | — |
| Apr 5, 2026 | 272 | — |
Station Information
- USGS Site No
- 13211205
- State
- ID
- County
- Canyon County
- Coordinates
- 43.6774, -116.7011
- Drainage Area
- 3,363 mi²
- Datum (ft)
- 2,337.1
- HUC Code
- 17050114
Recent Extremes
- Max discharge
-
2,070 cfsApr 18, 2026
- Min discharge
-
187 cfsMar 27, 2026
Computed from the local daily-values archive.
Nearby Gauges
-
West Hartley Gulch near Caldwell IDVery High1.7 mi · 21 cfs
-
Mason Creek at Caldwell IDVery High1.9 mi · 155 cfs
-
East Hartley above Backwater near Caldwell, IDVery High2.1 mi · 61 cfs
-
South Middleton Drain at Middleton IDVery High4.5 mi · 66 cfs
-
North Middleton Drain Mill Slough at Middleton IDVery High4.6 mi · 44 cfs