Idaho Whitewater Unlimited-IWU
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- Whitewater, Rafting
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Around here
Around Idaho Whitewater Unlimited-IWU
- Payette RiverRecreation area3.8 mi (opens in a new tab)
- Boise National ForestRecreation area9.2 mi (opens in a new tab)
- Payette River CorridorRecreation area11.5 mi (opens in a new tab)
- Sage Hen Creek Boat RampBoat ramp18.2 mi (opens in a new tab)
- Antelope Boat RampBoat ramp18.5 mi (opens in a new tab)
- Montour Wildlife/Recreation Management AreaRecreation area20.7 mi (opens in a new tab)
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
Typical flow by month
2000 to 2026
The water at Idaho Whitewater Unlimited-IWU typically runs highest in May, at a median 1,080 cfs, and lowest in September, at 94 cfs. The highest flow on record for any single day is 4,390 cfs, in 2019.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 146 | 126 to 180 |
| February | 168 | 139 to 228 |
| March | 372 | 283 to 550 |
| April | 851 | 507 to 1,215 |
| May | 1,080 | 796 to 1,620 |
| June | 585 | 412 to 907 |
| July | 179 | 152 to 213 |
| August | 106 | 95 to 123 |
| September | 94 | 85 to 107 |
| October | 110 | 96 to 122 |
| November | 130 | 107 to 151 |
| December | 136 | 115 to 168 |
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 26 years of record. Statistics published by the US Geological Survey for Middle Fork Payette River near Crouch ID (site 13237920). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Fri
85Go/ 100
CloudyHigh 58°F, low 40°FRain 2%Wind 7 kt, gusts 8
Streamflow
103 cfs
Below normal (12th)
Water level
5.50 ft
Air quality
26 Good
Garden Valley monitor, 2 km
National Weather ServiceBelow flood stage
Flood stage 11.8 ft. NWS reads 5.49 ft here.
NWS forecast: 5.52 ft by Sun 11 AM, below flood stage.
Forecast from Open-Meteo global models (NOAA & ECMWF). Flood stages and forecasts: NOAA National Weather Service. Air quality: Idaho Department of Environmental Quality via EPA AirNow. Preliminary data, not verified.
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