We paddled about 1.5km down the Isaac River on a stretch they call the "Roller Coaster" which took about 5 minutes. It was fun--going down the Chute gave you the same rush of adrenalin you get when you just miss getting in an accident, if you know what I mean? At the end of the Roller Coaster we had a short portage around a logjam and a smaller Cascades waterfall and then some additional canoe skills work learning to "ferry" across the current without losing any ground. Moving water is much more challenging--you have to really pay attention ALL the time.