The Whitewater River run from Nelsons Crossing to Confluence with Middle Fork Feather WSR in California is a popular destination for white water rafting enthusiasts. The ideal streamflow range for this run is between 1,000 and 2,500 cubic feet per second (cfs). The segment mileage of this run is 20.6 miles and has a class rating of III-IV.

Some of the specific river rapids and obstacles that rafters will encounter on this run include the Chunder, Jug Handle, and the infamous 3-hour tour. These rapids are known for their challenging technical moves and can be quite thrilling for experienced rafters.

There are specific regulations to the area that rafters should be aware of. For instance, all rafters are required to wear a personal flotation device (PFD) at all times while in the water. Additionally, the use of alcohol and drugs is strictly prohibited on this run.

In conclusion, the Whitewater River run from Nelsons Crossing to Confluence with Middle Fork Feather WSR is a thrilling adventure that requires experienced rafters. The ideal streamflow range is between 1,000 and 2,500 cfs, and the class rating is III-IV. Rafters should be prepared to encounter challenging rapids and obstacles, and they should follow all regulations and safety guidelines while on the river.