The Whitewater River Run Segment B in the state of Virginia is a thrilling river run that extends from the State Route 730 Bridge to the NF Boundary. This segment is about 8.5 miles long and is rated as class III-IV. The ideal streamflow range for this segment ranges from 300-1000 cfs, but can be done up to 1200 cfs depending on skill level and experience.

There are several notable rapids and obstacles in this section of the river, including the "Razorback," "Staircase," and "Big Falls." The Razorback is a technical rapid that requires precise maneuvering through a series of rocks and drops, while the Staircase is a long and continuous rapid that requires careful navigation through several ledges. The Big Falls is a 12-foot drop that is sure to provide a thrilling experience for kayakers and rafters alike.

It is important to note that this section of the Whitewater River is subject to specific regulations and restrictions. For instance, camping is not allowed within 300 feet of the river, and all visitors are required to pack out their trash. Additionally, all kayakers and rafters must wear a personal flotation device (PFD) and a helmet while on the river.

Overall, the Whitewater River Run Segment B is a challenging and exciting river run that is suitable for experienced kayakers and rafters. With its ideal streamflow range, class rating, specific river rapids and obstacles, and regulations, this segment of the Whitewater River is sure to provide an unforgettable experience for all who attempt it.