The lower ten-mile river run in Colorado is a moderately difficult section of water that offers exciting rapids and stunning scenery. The river features several class III and IV rapids, including "Pinball," "Screaming Left," and "Widowmaker." There are also several challenging rock gardens and boulder fields that require precise navigation. This section of water is best floated in the late spring and early summer when water levels are higher, with recommended flows ranging from 500 to 800 cfs. Overall, the lower ten-mile river run is a thrilling adventure that will test the skills of experienced whitewater enthusiasts.