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Willow Creek, located in Northern California, is a popular whitewater river run that offers exciting rapids and scenic views. The ideal streamflow range for this river is between 800-2,500 cfs. The river has a class rating of III-IV, meaning it is suitable for experienced paddlers who are comfortable with technical rapids and obstacles. The segment mileage for the Willow Creek run is approximately 14 miles, providing plenty of opportunities for paddlers to experience the river's unique challenges.

Some of the notable rapids and obstacles on the Willow Creek run include the Meatgrinder, a steep drop with a large boulder in the middle of the river that creates a challenging and technical rapid. Another challenging rapid is the Willow Creek Slide, which is a long and narrow chute that requires precise maneuvering to navigate safely. Paddlers should also be aware of the numerous rocks and boulders that line the river, as well as the occasional downed tree that can create dangerous obstacles.

Regulations for the Willow Creek run vary depending on the specific segment of the river being paddled. Some sections of the river may require permits or have seasonal restrictions in place. Additionally, paddlers should always be mindful of their impact on the environment and practice Leave No Trace principles to help preserve the natural beauty of the area.