The Rustic Upper River Run in Colorado is a moderate level Class III river run that is best floated during the early summer months when the water levels are at their highest. With tricky sections of rapids and rocks, the Rustic Upper River Run is best suited for experienced kayakers and rafters who are comfortable navigating through obstacles like the "Pine View Falls" and "The S Turn". It's recommended that the river's flow rate is around 800-1000 cfs to make for a more enjoyable experience. The stunning views of the surrounding mountains and forests make it a great destination for adventure-seekers looking for a thrilling and scenic float.