The Mokelumne River is a popular whitewater river run located in California. The ideal streamflow range for this river is between 800-2,000 cubic feet per second (cfs). It is rated as a Class III-IV river, with some sections reaching Class V during high water. The river has 37.5 miles of runnable water, divided into several segments.

One popular segment is the Electra-Middle Bar run, which is 18 miles long and takes approximately 6-8 hours to complete. This segment features several significant rapids, including the Class IV+ Tiger Creek Falls and the Class IV+ Devil's Nose. Other notable rapids include the Class IV+ Electra, the Class IV+ Bouncing Rock, and the Class IV+ Hamms Gulch.

There are specific regulations in place for this area, including a requirement for boaters to wear personal flotation devices (PFDs) at all times. Additionally, there are restrictions on camping and fires along the riverbank.

Overall, the Mokelumne River is a challenging and exciting whitewater run that offers a variety of rapids and obstacles for experienced boaters. It is important to always check current streamflow conditions before attempting a run and to follow all regulations and safety guidelines to ensure a safe and enjoyable experience.