We have a local cat sailor who is 75 yrs old. He is retired and gets out several times a week on his H-16 during the summer. He just got in to sailing a few years ago and loves it. He prefers leisurely sailing, but I have had him out on my boat flying a hull several times. I still feel sorry for the time he was out with me and we were double trapped downwind, hit a wave and he went flying up into the bridal foil before we flipped. My mother in law in her early 60's goes out with him some times. (See attached photo)
On the opposite side, I know another cat sailing couple in there mid to late 20's. We were at a 40th birthday party for another cat sailor. They were amazed that he was still sailing actively at 40.