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.