* WHAT...West winds 25 to 35 mph with gusts up to 65 mph possible. 6 to 10 inches of snow above 7,000 feet combined with gusty winds could result in visibility reductions due to blowing and drifting snow. * WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, Lost River Range, Sawtooth/Stanley Basin, Sun Valley Region, and Big Hole Mountains. * WHEN...From 5 AM to 5 PM Wednesday. * IMPACTS...Travel could be difficult, especially for high profile vehicles. Isolated damage to trees, powerlines, signs, and outbuildings is possible, along with isolated power outages. Loose outdoor objects could be blown around. Blowing and drifting snow could result in decreased visibility.
The main obstacle on this river run is the infamous "Torreys Slide," a long and steep Class IV rapid with a large wave train. It's recommended to float this section of the river between May and early July when water levels are higher, with ideal flows ranging from 3,000 to 5,000 cfs. Rafters should also be aware of the "Big Mallard Creek" rapid and "Step-down Rapid," both Class III rapids that require careful maneuvering.
| Last Updated | 2023-06-13 |
| River Levels | 1070 cfs (2.14 ft) |
| Percent of Normal | 110% |
| Optimal Range | 700-7000 cfs |
| Status | Runnable |
| Class Level | II |
| Elevation | 3,922 ft |
| Run Length | 17.7 Mi |
| Streamflow Discharge | 1110 cfs |
| Gauge Height | 2.3 ft |
| Reporting Streamgage | USGS 13302500 |
| Location | Reservations | Toilets |
|---|---|---|
Whiskey Flats Campground
|
||
Holman Creek Campground
|
||
Holman Creek
|
||
Marshall Creek Campground
|
||
Lower Obrien
|
||
Lower O'Brien Campground
|