The Calf Creek to Lake Powell river run in Utah on the Fremont River is a Class II-III river run with some technical rapids and boulder gardens. The best time to float this section of water is in the spring when water levels are high, with recommended flows between 300-800 cfs. Obstacles include tight turns, rocky sections, and occasional logjams. Navigation can be challenging in places, so it's recommended that only experienced paddlers attempt this run. Overall, this section of the river provides a scenic and challenging adventure for those seeking a wilderness experience.