Magical trail ! ( I don’t remember seeing a waterfall ?) We did it in 3 hours with a 9 months old baby in a backpack carrier. ( we had to stop to feed him) You definitely need to be fit - as there is some climbing involved halfway - and you have to go through a very dense laurisilva forest (30 min) which is the most mystical part. Trail shoes are necessary as it is slippery. Enjoy !