The NSV River Run in Colorado is a challenging Class IV-V section of water that is best navigated by experienced kayakers and rafters. The run features numerous technical rapids, including the infamous Toilet Bowl and Staircase, as well as dangerous undercut rocks and steep drops. The ideal time to float this section of water is in the late spring or early summer, when the water levels are high, ranging from 600-1200 cfs. It is important to note that this section of water is not recommended for beginners or those without proper training and experience.