We did this tour with 13 of us. The oldest was 75 and the youngest was 9. My daughter, the 9 year old, has long hair and they required her to tie it back. We put her hair in a pony tail and had no problems. I am afraid of heights, but by zip line #10 (there are 14) I was looking down and all around. They start you out with short ones to get you used to it and by the end you are a pro! I highly recommend this tour. The guides are very competent and the owners are great. This was definitely a highlight of our trip.