The Whitewater River run Confluence with Ranier Fork to Confluence with Bumping River in the state of Washington is a challenging and exciting route for experienced whitewater enthusiasts. It is rated as Class IV and requires strong paddling skills to navigate the series of technical rapids and obstacles along the 7.5-mile stretch of the river.

The ideal streamflow range for this section of the river is between 800-2000 cfs. Lower than 800 cfs and the river becomes too bony and challenging to navigate, while above 2000 cfs the rapids become too powerful and dangerous.

Some of the notable rapids and obstacles along the route include S-Turn, Double Drop, Pinball, and Corkscrew. These rapids offer a mix of technical maneuvers, large drops, and powerful hydraulics that require precision paddling and strong teamwork.

There are specific regulations in place for this area, including a permit requirement from the National Forest Service. The permit allows for a maximum of 12 people per group and is required from May 15th to September 15th. Additionally, all participants must wear a properly fitted personal flotation device (PFD) and helmets while on the river.

In summary, the Whitewater River run Confluence with Ranier Fork to Confluence with Bumping River is a challenging and exciting route that requires advanced paddling skills and experience. It is important to pay attention to the ideal streamflow range, class rating, segment mileage, specific river rapids/obstacles, and specific regulations before attempting this run.