Lower Piru Creek is a popular whitewater river run in California that stretches from the outlet at Pyramid Reservoir to Piru Reservoir. It is rated as a Class III-IV river, with a recommended streamflow range of 200-500 cfs. The segment mileage of this run is approximately 8 miles, with various obstacles and rapids along the way.

One of the significant rapids on the Lower Piru Creek is the Devil's Gate, which is a Class IV rapid that requires technical maneuvering. Other notable rapids include the Triple Threat, a Class III rapid, and the Staircase, which is a Class III-IV rapid. The river run is known for its scenic views and challenging rapids.

There are specific regulations that users must adhere to when visiting the Lower Piru Creek. For instance, visitors are required to obtain a permit from the Bureau of Land Management before accessing the river. Additionally, visitors are encouraged to practice Leave No Trace principles while on the river and to pack out all trash.

In conclusion, Lower Piru Creek is an exciting river run that offers challenging rapids and stunning views. The recommended streamflow range is 200-500 cfs, and the river is rated as a Class III-IV. Visitors must obtain a permit from the Bureau of Land Management before accessing the river and practice Leave No Trace principles while on the river.