The Whitewater River Run Mainstream from the Confluence with South Fork Little Rock Creek to Little Rock Creek Reservoir in California is a popular destination for whitewater enthusiasts.
The ideal streamflow range for this segment is between 300-800 cfs, and the class rating for this section is a mix of Class III-IV rapids. The segment mileage is approximately 6.5 miles and takes about 3-4 hours to complete.
Some of the notable rapids and obstacles on this run include Leap of Faith, Roller Coaster, and S-turn. These rapids can prove challenging, with narrow chutes, steep drops, and strong currents. Therefore, this run is recommended for experienced paddlers only.
Specific regulations to the area include a Forest Service permit, which is required for all visitors entering the San Bernardino National Forest. Additionally, all boaters must wear a personal flotation device (PFD) at all times on the river and respect the "pack it in, pack it out" policy to help preserve the natural beauty of the area.
Wind
Humidity
| Last Updated | 2026-02-07 |
| River Levels | 54 cfs (1.85 ft) |
| Percent of Normal | 210% |
| Status | |
| Class Level | iii-iv |
| Elevation | ft |
| Streamflow Discharge | cfs |
| Gauge Height | ft |
| Reporting Streamgage | USGS 10263500 |
| Location | Reservations | Toilets |
|---|---|---|
Pacifico Mountain Camp
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Mt. Pacifico
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Mt. Pacifico Campground
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Cooper Canyon Trail Camp
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Bandido Group Campground
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Horse Flats
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Mainstream - Confluence With South Fork Little Rock Creek To Little Rock Creek Reservoir
Cooper Canyon- Near State Highway 2 (Sw 1/4, Ne 1/4, Sec 16, T3N, R10W To Confluence With Little Rock Creek
Mainstream - Confluence With Cooper Canyon To Confluence Wit South Fork Little Rock Creek
Mainstream - Headwaters To Confluence With Cooper Canyon
North Fork - Confluence Of Soldier And Coldbrook Creeks (Se1/4,Sw1/4, Sec) 5, T2N,,R9W To Conflluence With West Fork Of San Gabriel (Sw 1/4,Sw1/4, Sec 17, T2N, R8W)
Gaging Station Below Spillway Of Cogswell Dam (Ne 1/4, Se 1/4, Sec 19, T2N, R10W) To Confluence With Nf San Gabriel River (Sw 1/4.Sw 1/4, Sec 15, T2N, R9W)