The Hittle Bottom to Rocky Rapid river run on the Colorado River in Utah is a moderate difficulty run with Class II and III rapids. The best time of year to float this section is from May to September with recommended CFS levels ranging from 1,000 to 10,000. The river includes obstacles such as Big Tree Rapid, Funnel Falls, and Rocky Rapid. It is important to note that this section of the river is not suitable for beginners and requires some experience in whitewater rafting.