The Gnar Section of the South Platte River in Colorado offers a thrilling and challenging whitewater experience. The section is rated as Class IV and includes several challenging rapids, such as Widowmaker, Staircase, and Two Step. The best time to float this section is during the spring runoff, typically between May and June, with recommended CFS levels of 600-800. It is important to note that this section contains several river obstacles such as rocks, drops, and steep chutes, so it is recommended to have advanced whitewater experience and proper safety gear. Overall, the Gnar Section is a must-do for experienced whitewater enthusiasts seeking an exhilarating adventure.