Well from our experience (sorry for jumping in Duece) it holds 14 or 15. Last year we organized enough people so we could have a private tour/ride. We loved that as we could have the boat's speed to what we were comfortable with. That goes both ways faster or slower!
It was a fantastic experience and my kids did it again this year so I think they have done this 3 times now! It is really a great way to see the island and learn a little and have fun too.
I would highly recommend this!!!
