I enjoy horseback riding. 
I have never rode a horse, but I do enjoy watching them in endurance riding, eventing, show jumping, and polo. 
Do you know any type of horse show
Yes, my friend actually attended the Sussex County Farm and Horse show last August!
Was it fun? what is the even about?
It is a 10 day event / fair that they have in Sussex Country Fairgrounds in New Jerzey every year. They show horses and have horse races.
Since when has the event been in existence? 
Non profit since 1940, at the state fair since 1999.