This is one of those aptly named rapids. The start of the rapid is very ambiguous, essentially at some point you will have noticed the continuous Class IV just got a hell of a lot burlier! About a mile of non-stop Class V later you will come to something resembling a pool, this could be considered the end of Long Rapid. This is the deepest part of the Embudo Gorge, if you swim here you are SCREWED!