The Marysvale Canyon river run on the Sevier River in Utah is an exciting experience with Class II to III rapids. The river offers beautiful scenery including stunning red rock cliffs and lush forests. There are some obstacles on this run, such as strainers and a steep drop at Collier Rapids. The best time of year to float this section of water is in the spring, when the water levels are high, typically around 1,000 to 2,000 cfs. This run is not recommended for beginners, but experienced paddlers will enjoy the challenging rapids and beautiful surroundings.