This dramatic example of what’s locally called ‘upside down land’ is the result of hydraulic sluicing where jets of water blasted away the earth and washed it through a sluice box, trapping the gold in the sluice. Due to the environmental impact this method was stopped in many places during the gold rush, and scenes such as Red Knob act as part of an historical record of the land. The best views are from the side of the road, and the valley is filled with poplar trees that create a sea of yellow during early autumn.