Pipe Creek is a popular whitewater river run located in California, USA. The ideal streamflow range for Pipe Creek is between 100 to 500 cubic feet per second (cfs), making it suitable for intermediate and advanced level kayakers. The river is rated as class III to IV, which means it has moderate to difficult rapids with strong eddies and waves. The segment mileage of Pipe Creek is approximately 8 miles, which can be completed in a day.

The river rapids in Pipe Creek are renowned for their unique and challenging obstacles such as Boxcar, Nutcracker, and Chamberlain Falls. Boxcar is a class IV rapid with a narrow channel and a sharp left turn, making it a challenging obstacle to navigate through. Nutcracker is a class III rapid with a long channel and large waves that require kayakers to maintain their balance and speed. Chamberlain Falls is a class IV rapid with a steep drop and a large wave at the bottom, making it a thrilling and adventurous challenge for kayakers.

As with all river runs, there are specific regulations that kayakers must follow while on Pipe Creek. Kayakers must wear a personal flotation device and a helmet at all times while on the river. Additionally, kayakers must be aware of the wildlife in the area and avoid disturbing the natural habitat of animals such as the California condor and the steelhead trout.

In conclusion, Pipe Creek is a challenging and thrilling whitewater river run in California with ideal streamflow range between 100 to 500 cfs. The river is rated as class III to IV with unique and challenging obstacles such as Boxcar, Nutcracker, and Chamberlain Falls. Kayakers must follow specific regulations while on the river, including wearing personal flotation devices and helmets and being mindful of the wildlife in the area.