No way! 16 is a great age and it is never too old to teach a horse new things.
I broke in a 13 year old Arabian for a client last summer. Never been ridden before. He is doing beautifully under saddle so it is never too late to show them something new! In fact, I find the older horses have a longer attention span and are therefore much easier to train in some respects.
Heck no, 16 is a great age. I've known tons of horses in their 20's who could easily handle that workload. It all depends on the individual horse, and as long as yours isn't slowing down at all (which at 16 years should be unheard of without underlying health problems) then give 'er heck!
When I still had the farm there was a horse dealer who had this Cldesdale Cross gelding. The horse was 16 and he could not get him sold... Picked him up at an Auction. His name was Ben and he was a lovely bay with stockings and blaze.. very Clyde looking.
Since the dealer was going to sell him for meat, I up and bought him. Paid Meat price too. I used him some on the farm for chasing down cows and fixing fences.. even took him in a horse show once and he placed in a conformation class (of all things).
When he was 18 I gave him to my sister (who also had a farm) so my nephew could ride (he was 5 or 6). She had him for years.. mostly he got to be a pasture ornament tho he was sound and very rideable. Eventually SHE gave him to the man next door who always wanted a horse. He got the best of care and some use for a few more years. He was in his 30's.
Finally he was retired and he lived to be 40 years old. I would say he was useful and not sway backed at all (the importance of the top line!) and was used right up to about age 36 or 37. The horse outlived the dealer who sold him to me and he outlived my ex husband.
No way! Go for it. Like an above poster said, horses (unlike some people lol) are never too old to learn new things. It's how they survive in the wild & so the same principals can be applied to just about anything. ;)
I agree, 16 isn't at all too old to be doing things like trick riding with. Just keep in mind older horses do take slightly longer to build up muscle and endurance to participate in such sports, and will take longer to warm up and cool out. But other than that, go for it!
Agree - No way! I have 3 in their 20's (21, 22, & 29) and wouldn't doubt their ability to do that for a second, although I would most certainly doubt mine..getting a little too old for that LOL! Sounds fun! Good luck!