How do you back a horse while mounted? Earn the Horseback Riding badge! 1. How do you back a horse while mounted?Relax your body, look back, pull the reins, release.Pull back on the reins, looking over your shoulder.Squeeze your legs, flex the reins, say "back", release with each step.Pull back on the reins and kick. Loading... Share this:ShareFacebookTwitterPinterestLinkedIn