The Whitewater River Run is a popular destination among whitewater enthusiasts in the state of Washington. The headwaters of the river begin in the North Cascades National Park and includes all of its tributaries up to its confluence with Bridge Creek.

The ideal streamflow range for the Whitewater River Run is between 1,000-5,000 cubic feet per second (cfs). This range provides enough water to create thrilling rapids while still ensuring the safety of paddlers. The river is rated as a Class III-IV, which means that it has moderate to difficult rapids with significant drops and obstacles. It is recommended for experienced paddlers and those who have completed a whitewater safety course.

The segment mileage of the Whitewater River Run varies depending on the route taken. The most popular section is the 8-mile stretch between the Skagit River and the town of Marblemount. This section includes numerous rapids, such as Railroad Rapid and Pipeline Rapid, which offer an exciting challenge to paddlers.

There are specific rapids and obstacles to be aware of when navigating the Whitewater River Run. For example, Fangs Rapid is known for its series of sharp rocks that can damage equipment. Additionally, paddlers should be cautious of wood debris that can accumulate in the river and avoid the large boulders in Boulder Alley.

There are specific regulations in place to ensure the safety of all those who use the Whitewater River Run. For example, all paddlers are required to wear a US Coast Guard-approved personal flotation device (PFD) and a helmet. Additionally, there are restrictions on the use of motorized watercraft and on the placement of anchors in the river.

Overall, the Whitewater River Run offers an exciting and challenging experience for whitewater enthusiasts. With its ideal streamflow range, class rating, segment mileage, and specific rapids and obstacles, it is a must-visit destination for experienced paddlers. However, it is important to follow all regulations and safety guidelines to ensure a safe and enjoyable trip.