There is a weight limit. You must be between 85 pounds and something like 325. I know the top end is over 300. I booked my DS and DH to go on our 11 May trip. DS wouldn't go at first, so DH went up alone. They offered to let both go up at the end, by DS still wouldn't so DH did it twice. He said that there were two young ladies who went tandem on his boat.