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The Whitewater River run in the Glacier Peak Wilderness Boundary to Confluence with Wenatchee River in Washington State is an exciting adventure for experienced paddlers. The ideal streamflow range for this run is between 1,500 and 3,000 cubic feet per second (cfs). The Whitewater River run is rated as Class IV+, which means that it is challenging and demands advanced paddling skills, strength, and endurance. The total mileage of this segment is approximately 6.5 miles.

The river rapids and obstacles on this run are numerous and demanding. The most significant rapids on this stretch of the river are the Meatgrinder, which is a long and continuous rapid, and the Boulder Drop, which is a steep and technical drop. Other notable rapids on this run include the Pencil Sharpener, the House Rock, and the S-Turn. Additionally, there are several logjams and sweepers that paddlers must navigate around.

It is important to note that this river run is located within the Glacier Peak Wilderness Area, which is subject to specific regulations. Visitors to this area must obtain a permit and follow Leave No Trace principles to minimize their impact on the environment. Additionally, campfires are not permitted in the area, and all waste must be packed out. Overall, the Whitewater River run in Washington State is a thrilling and challenging adventure that demands experience, skill, and preparation.