How far can the average horse go in eventing?

Obviously it depends on the individual horse, but I feel like almost any horse can do lower level eventing.

However, is there a certain level you would say the average "backyard horse" GENERALLY doesn't get past? BN? Novice? Training?

Thanks :)

I would say Novice.

I think the fitness required at Training, as well as the height (3'3"), spread and type of fences, is a stretch for the average backyard horse.

I also say Novice, for the same reasons as Maura pointed out.

I have a little 15.2 hand QH gelding who is a pretty average "backyard horse". He's quiet, anyone can get on him, easy keeper... the whole 9 yards (though, for a QH his conformation is good and he's not built downhill). He goes Novice and has schooled training. He can do training, but you can tell it's a bit of a struggle for him. He MIGHT be able to do a spring training course, but definitely couldn't handle a late-season course.

Novice is well within his comfort zone though.

Ditto, novice.

Thanks you three! :)

My last horse was a Qh/Tb cross and I evented her to the Intermediate level. I think its the individual horse and their attitude.