In general, I don't think that paints and QHs are in the same league as Arabians when it comes to endurance. Although, there are some stand out individuals of the breed that might do well in the sport.
Agreed, AKPaint. QHs are great at going that quarter-mile really fast! But for endurance, they may not cut it in high-end competition. My Paint/TB trained for endurance with is previous owner. He did well, so it can be done, but they never planned to do national competition or anything!
Ria, when I first read your post, POA came to mind. My friend had one and he was very personable and like to learn tricks. He could also canter for days and days!!
Probably an experienced horse but yet still in his prime.
That could really vary too. Lol.
As long as the horse is well cared for, conitioned and healthy, it can still be a great endurance horse. Most Arabs already have a nautrual "spirt".
There have been Arabs that have won the Tevis cup when they were in their teens.
I would look into the Bashkir Curlies. They are easy to train, come in a variety of sizes and body types, have AMAZING feet and legs, and are great for endurance and trail riding. They are extremly smart and you usually have to stay one step ahead of them in their mind process, but they keep you on your feet! Lol Their personalities are soooo mellow, they have puppy dog personalities. Look into them! PM me if you want more information...