Horseback riding...Although from experience it sure does hurt when the throw ya off. :)
I like them both but I can drive about a mile and a half and reach Selby Stables and ride along the American river any time. So, it's riding horses for me. Very relaxing riding along the half dried up river.
I'm in WV, so white water is kind of a way of life here, it's amazingly fun and there's lots of rivers to choose from here. Intruding horses is more relaxing and less strenuous and i like it too.
Neither.