The Whitewater River Run from Headwaters in Sec 2, T9N, R18E to Confluence with Mokelumne River in California is a popular and exciting spot for whitewater rafting enthusiasts. The ideal streamflow range for this section is between 500 to 1000 cubic feet per second (cfs), which typically occurs during the spring season.

This section is rated as class III-IV, making it suitable for intermediate to advanced rafters. The segment mileage of this section is about 17 miles, with several rapids and obstacles along the way. The most notable of these is "The Narrows," a tight, technical section of river that requires precise navigation.

In addition to the thrill of the rapids, visitors to this area must also abide by specific regulations. For example, all boats must have a Type III or V Coast Guard-approved personal flotation device (PFD) for each person on board. Additionally, visitors are encouraged to practice Leave No Trace principles to ensure the preservation of the natural environment.

Overall, the Whitewater River Run from Headwaters in Sec 2, T9N, R18E to Confluence with Mokelumne River offers a challenging and exciting whitewater rafting experience for those who are prepared. Visitors should always check the streamflow levels before visiting and ensure that they have the necessary equipment and skills to navigate this section safely.