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The Lacks Creek section of the Whitewater River in California is an exciting Class III-IV run that is best experienced during the spring and early summer months. The ideal streamflow range for this run is between 500 and 1,500 cubic feet per second (cfs) with peak flows often occurring in May or June. The segment mileage for the Lacks Creek section is approximately 6 miles and features a number of thrilling rapids, including the popular "Toilet Bowl" and "Rock Crusher."

It is important to note that this section of the Whitewater River is located on private property and requires a permit from the landowner, which can be obtained through California Whitewater. Additionally, all boaters are required to wear a personal flotation device (PFD) and helmets are strongly recommended due to the nature of the rapids.

Overall, the Lacks Creek section of the Whitewater River offers a challenging and exhilarating experience for intermediate to advanced boaters. As with any river run, it is important to check current streamflow conditions and any potential hazards before embarking on the trip.