The Whitewater River run in Washington state is a thrilling adventure for experienced paddlers. The ideal streamflow range for this run is between 800-2000 cfs, with peak flows occurring in May and June. The segment mileage of this run is approximately 10 miles, from the Glacier Peak Wilderness Boundary to the confluence with the Skagit River.

The Whitewater River run is rated as a Class V+ run, which means that it is extremely challenging and should only be attempted by experienced paddlers who are prepared for the intense rapids and obstacles. Some of the specific rapids and obstacles on this run include Boulder Drop, S-Turn, Widowmaker, and Chaos.

There are specific regulations in place for the Whitewater River run to ensure the safety of paddlers and protect the surrounding wilderness area. Paddlers are required to obtain a permit from the National Forest Service before embarking on this run. Additionally, paddlers are required to follow Leave No Trace principles and respect the wildlife in the area.

In conclusion, the Whitewater River run in Washington state is a thrilling adventure for experienced paddlers, with an ideal streamflow range of 800-2000 cfs and a segment mileage of approximately 10 miles. The Class V+ rating and specific rapids and obstacles make this run extremely challenging. Paddlers must obtain a permit and follow regulations to ensure their safety and protect the surrounding wilderness area.