How many hours a day trail ride a horse daily?

It all depends on your horse. If you have a horse with good stamina, or you plan to only walk and trot, you can ride for longer. If you're like me, you love cantering, galloping and jumping over home made jumps :). You can't trail ride as long, it will tire your horse out. Sometimes, I'm on my horse for over 2 1/2 / 3 hours, but I give my horse breaks. It depends on what you can do and what your horse can do.

:) I <3 riding :)
hope this helps you!