I don't dare! My daughter rides her very lightly - just a little light trail riding. The mare hadn't been ridden in a very long time before we got her - nearly two years. She pitched a bucking fit when the previous owner got on her, but has never given us any trouble. I've been on her a couple of times, just to sit. The problem is, I'm a short, VERY FAT old lady. I weighed nearly 300 when we first got Dancer. I'm down to about 255 now, but I'm afraid I'm still much too heavy for her, or pretty much any horse. Still working on it.
I'm really jealous that the daughter can ride her. One thing the previous owner didn't mention about the mare, and it's a pretty important detail IMHO, but Dancer single foots. When she hits that stride, she just floats along. Daughter says it's even more comfortable than her own mare's gaits, and daughter's horse is a Paso Fino. Go figure.